Plants
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Dicotyledon plants |
Carpet
water lily (Nataronymphaea pustulosa)
Order: Nymphaeales
Family: Nymphaeaceae
Habitat: rivers of Central Africa.
Climatic changes of boundary of Holocene and Neocene have affected tropical
flora. The area of woods was reduced, and thereof some rivers have dried up
completely. Later, when conditions in biosphere were normalized, the climate
became more damp and steady, and plants have started to evolve actively. Among
them there were species mastering new ecological niches.
Nymphaeas family to which water lilies, candocks, and some other plants belong,
from the moment of occurrence at the end of Mesozoic took a convenient place
of shallow water plant. But in Neocene among them one unique plant, which has
completely lost connection with bottom, has appeared. It is carpet water lily,
filled up numbers of plants freely floating on water surface. Thickets of this
plant species cover surface of lakes and shallow rivers of Africa from Sahara
Nile up to Okavango Lake.
Carpet nymphaea is floating plant of the small size: diameter of crown is at
all about half meter (at some of its relatives only one leaf may reach such
size!). Leaves are rounded, growing on short petioles. Tissue of leaves is
thick and spongy; intervals between nerves are strongly thickened and also
filled by lacunose parenchyma, forming air bubbles (leaves look as if “quilted”).
It permits a plant to keep swimming. The basic stalk is short, covered with
thick spongy crust. At reservoir drying it falls to ground, and sustains drought.
Roots are long; they hang down up to meter depth. They serve to the plant for
maintenance of balance, and also for nutrients absorbing. Roots are covered
with long hairs and look fluffy. At plants floating near of coast, roots grow
into silt, and plant starts to develop more intensively.
Similarly to all floating plants, the carpet water lily breeds mainly by sarments,
on which ends young plants develop. For one year from one plant theoretically
it can turn out up to three hundred new ones.
Vegetative multiplying is not a unique way of breeding of this plant. The carpet
water lily easily and quickly breeds by seeds. It flowers frequently and plentifully.
Flowers are small (diameter of flower is up to 5 – 6 cm) and numerous – up
to 10 ones and more at the plant. They rise above water surface a little on
short peduncles. Flowers are brightly colored and well appreciable from afar:
petals are pink, and stamens are yellow. They are pollinated by bees and small
beetles. Seeds are covered with layer of spongy tissue, therefore they do not
sink. Under layer of spongy tissue there is a dense environment due to which
seeds can endure a long drought. They quickly sprout only in fresh rain water.
If in water there is a plenty of products of decay, and its reaction is acidic
– it is a signal of drought approaching, and seeds stay in condition of rest.
Even if adult plants will be lost, the part of seeds remains, and the population
of carpet water lily will be restored from them. Sprouts quickly start vegetative
breeding – having formed four leaves, the young plant already forms sarment.
True
cabbage tree (Brassixylon crassus)
Order: Capparales
Family: Brassicaceae
Habitat: dry districts of Southwest Asia, Northern Africa and Southern Europe.
The lot of species of plants of Holocene epoch had been named “cabbage trees”.
But this name was given to them exclusively for external similarity of some
parts of plant to cabbage cultivated by people. But the tree has appeared in
Neocene in dry areas of Southwest Asia (in foothills to the east from the Mediterranean
lowland), and later settled on coast of Mediterranean swamps, is named more
deservedly: it is one of close relatives of cabbage, belonging to the same
botanical family.
The true cabbage tree will not make a competition to giant trees of tropical
forest: its maximal height does not exceed 13 – 15 meters. But it can survive
in places, where dry and hot wind blows and settles on ground thin coating
of salts from salt Mediterranean swamps.
In connection with very dry climate in places of inhabiting of this tree, at
it the number of adaptations was developed, permitting to survive in extreme
conditions. True cabbage tree is stem succulent: very thick trunk similar to
a bottle serves to it for accumulating of water stock. It is strongly expanded
in the bottom third, and sometimes lays on the ground: it seems, as if tree
has not sustained weight of the “beer stomach”. Wood of this plant is fragile
and friable, plentifully sated with water. But only few ones venture to drink
it: tree reliably protects itself with the help of bitter substances dissolved
in sap. Leaves of this tree also have bitter taste. They are juicy and rather
wide: the tree leads active photosynthesis the most part of year, running in
stagnation (“catalepsy”) only in hottest summer months. But also then the most
part of leaves is kept, only oldest ones cast. Young leaves form original crowns
on tips of tree branches. Petioles of leaves can make movements, and depending
on environmental conditions tree folds leaves in similarity of cabbage heads,
or spreads them. Usually leaves are folded together at night and in hottest
time of day, being opened in the morning and in the evening. But in cloudy
days crowns of leaves may open all the day. Besides for reduction of moisture
loss leaves are covered with thin wax cover.
True cabbage tree extracts water from deep layers of ground, therefore it prospers
in areas where underground waters approach close to a surface. In rare oases
of Northern Africa this tree forms original thin woods both with palms and
some other plants.
This plant, as against to cabbage, is perennial: the age limit of it may exceed
200 years. It also blooms more than once in life, but annually approximately
from 5-years age. Large pink flowers with four petals in big corymb-like inflorescences
open on uppermost branches in middle of short rain season, involving butterflies and
flies. Each flower blooms not for long time – only two days and one night.
Therefore many flowers of this plant remain not pollinated. Fruits of true
cabbage tree look like long and braided, as if a drill, pods. At a touch (for
example if any bird sat on inflorescence) ripe fruit “blows up”: folds instantly
braid and scatter seeds far. An environment of seeds is naked, but very strong
and bright: red with white speckles. Birds involved with such colouring, peck
these seeds. But in their stomachs the environment is not digested, but becomes
only a little thinner and more permeable. Having dropped out from intestines
of bird with portion of dung, seeds have good chances of growing.
The first year young plant has underground tuber-like stalk (“root crop” formed
by hypocotyl of sprout, and the crown of small leaves on the ground surface.
At the second year growth of trunk begins though the underground thick stalk
does not disappear still long time. If the trunk will be damaged (more often
simply had eaten), the plant has chance to survive due to underground part.
False-leaved prickly pear tree (Equadopuntia pseudophyllata).
Order: Caryophyllales (Caryophyllales)
Family: Cactuses (Cactaceae)
Habitat: Galapagos Islands, coastal areas.
Galapagos Islands in human epoch had differed in droughty climate: at them
there were no constant reservoirs, and fresh water could be found only in rain
pools. Therefore the vegetation of three types prevailed at this archipelago:
xerophytes (enduring significant dryness of ground), succulents (stocking water
in trunks) and mangrove vegetation (able to live in sea water).
Succulent vegetation of Galapagos Islands had been presented by several species
of cactuses among which prickly pears (Opuntia) were most typical ones. These
cactuses with wide flat stalks had reached the size of tree at Galapagos Isles.
Huge local tortoises had been unique animals ate these cactuses. Introducing
of goats to these islands even turned to cactus’s advantage: number of tortoises
had reduced, and goats were eaten away other plants, had lost cactuses of natural
competitors. Therefore prickly pears had remained dominant plants at Galapagoses.
Neocene descendant of Galapagos prickly pears has remained a treelike plant.
But changes of climate had forced it to change shape though some basic features
of cactuses nevertheless had kept at it. Galapagos false-leaved prickly pear
tree grows up to 20 meters in height, and trunk of old tree may grow up to
6 meters in diameter. At this species the differentiation of sprouts to two
sharply distinguishing types is precisely shown. Trunk and main branches of
this tree are covered with thick, friable and easily crumbled bark. Such bark
reliably protects trunk of plant from overheat, thus reducing losses of moisture.
Wood of prickly pear tree is friable, watery and rather fragile. During hurricanes
some trees fall, but continue to grow, taking roots in ground. Also separate
branches of prickly pear tree easily take roots.
Sprouts older than three years keep spikes gathered in bunches by some ones
on the surface. On young branches sprouts of other type grow: green and soft
oval annual “leaves” almost without spikes. Only on edges of such “leaves”
short spikes stick up. Most part of “leaves” of this plant lives only one year,
drying and falling down in dry season. Only youngest “leaves” may go through
it and keep two seasons in succession.
Prickly pear tree flowers almost the year round, only in summer drought it
may stop flowering, simultaneously shed “leaves”. Flowers of this plant are
bright red with long petals, up to 10 cm in diameter. They produce a lot of
nectar, but are smellless: this plant is pollinated by birds. Fruits of prickly
pear tree are sweet and juicy, pear-shaped and covered with spikes. Local birds
peck them, eating pulp and carrying seeds, and fallen fruits are eaten by large
local tortoises.
Prickly pear tree grows rather quickly, giving for one year apical growth about
a meter tall. But this tree lives not for long: no more than 200 years.
The idea about existence of this plant had been supposed by Simon, the forum member.
Mauritian false-berry tree (Pseudobaccodendron mauritianus)
Order: Caryophyllales (Caryophyllales)
Family: Goosefoots (Chenopodiaceae)
Habitat: forests of Mauritius Island.
In human epoch flora and fauna of Mauritius Island had put heavy on trail –
till some centuries as much species of plants and animals had been introduced
to this island, as, probable, had evolved her during millions years of natural
evolution. The degradation of primal flora and fauna of island and its full
extinction up to Neocene had been quite natural result of it.
In conditions when the primal Mauritian flora appeared in depression, the introduced
species had started to evolve actively. In favorable tropical conditions even
grassy plants became giants and had turned to trees. One of such trees, Mauritian
false-berry tree, is widespreaded in humid valleys and coasts of island. Its
ancestor is one species of orach (Atriplex) introduced to Mauritius by people.
At the process of evolution orach had turned from grassy plant at first to
woody half-shrub, then to bush, and farther to tree. At the continents the
goosefoots family is represented mainly by grassy plants, but occasionally
among them treelike forms appear. Saxaul (Haloxylon) is one of such species.
It is adapted to extreme desert conditions and shows an opportunity of occurrence
of treelike plants in family represented mostly by grasses. As against saxaul,
false-berry tree has not got used to such Spartan life: this is a plant of
tropical forest preferring moisture and an abundance of sunlight.
The height of false-berry tree may be up to 20 – 25 meters at thickness of
ridge trunk up to 3 meters at the basement. This is the tree with powerful
deep root system (as the answer to presence of hoofed mammals in Neocenic fauna
of Mauritius) and firm white wood. Bark of false-berry tree is thick, covered
with deep longitudinal cracks and colored light grey. The crone of this tree
is similar to cypress one – it is high and pointed to top.
Leaves of false-berry tree are externally similar to willow ones – they are
narrow and oblong, richly covering young sprouts. From above each leaf is covered
with microscopic bubbled hairs protecting from surplus of sunlight and giving
to tree crone the silvery shade appreciable from afar. There is especially
large amount of hairs on young leaves having pinkish shade. Hairs protect from
solar burns, disseminating light reaching the surface of leaves, but prevent
the water evaporation. However, the plant has the adaptation solving such problem:
at the edge of leaves hydatodes (water excreting glands) are located. From
time to time from them the drop of water emits and is quickly got rolled from
the leaf due to hair cover. Therefore, animal wandering in thickets of Mauritian
false-berry tree may get wet quickly even in dry day. This tree grows in river
valleys and near bogs.
False-berry tree blossoms extremely ordinary: tiny flowers pollinated by wind
do not have petals, and it is possible to detect externally the flowering of
tree only having examined its flowers specially. Tiny flower without petals
is the common feature of family representatives. But the fructifying tree is
appreciable from apart. This plant has received the name because of the appearance
of fruits. At the most part of plants belong to goosefoots family fruits are
usually dry, densely covered with wrapper of sepals and falling off in common
with it. The juicy fruit looks the exception from the rule. And false-berry
tree is just one of such exceptions. At it to the moment of seed ripening the
calyx does not dry out, but expands, overgrowing fruit from all sides, and
becomes juicy and even sweetish. Ripen fruit of false-berry tree in size is
like a large cherry. Its color also changes: the calyx becomes bright red and
is appreciable from afar on a background of silvery foliage, involving birds
and monkeys eating fruits. Ripen fruits are easily showered from wind, and
they are eaten willingly by local land animals: very small forest pigs and
dryocaprellas – dwarf descendants of goats.
When the seed of tree passes through the stomach of animal, its environment
becomes more permeable for water and it sprouts easier. Numerous germs of false-berry
tree perish or appear oppressed in shady underbrush. In shadow their growth
is strongly slowed down, and plants as though stop in growth at height no more
than one meter. The majority of such young plants may be eaten by local herbivores.
But when any old tree falls, young sprouts of false-berry tree start to grow
further quickly. In first year they grow up two meters, having “slipped by
a mouth” of local dwarf herbivores having the minimal damage. Further rate
of growth decreases, but the tree trunk starts grow thick and at its basis
powerful plank-buttress roots grow.
False-berry tree lives till 300 years and more, and starts to fructify from
10-years age, having reached about half of maximal height.
Mexican clawleaf (Phyllonyx mexicanum)
Order: Fabales (Fabales)
Family: Peas (Fabaceae)
Habitat: deserts of Mexican plateau.
In deserts plants grow, able to resist to severe environment and to win in
rigid and uncompromising struggle for existence. At them there are two main
enemies – dryness and herbivores. And plants during the evolution develop various
strategies. In desert stretched on Mexican plateau, one of plants had adapted
to repulsing herbivores.
When in desert spring begins, from the ground accurately closed feather-like
leaves appear. They quickly grow, forming compact crowns. Each complex feather-like
leaves about 30 – 40 cm long consists of approximately ten pairs of oval simple
leaflets up to 3 cm long. On the tip of each leaf the middle nerve forms very
acute spike. This feature has determined the name of this plant – Mexican clawleaf.
Spikes are very widespread weapon of desert plants. But the clawleaf has added
to this feature of structure one more skill, characteristic for peas (however,
not only for them only). In the basis of each leaflet there is the layer of
tissue consisting of cells able to pump up water fast and to release it. It
gives remarkable properties to leaves.
Usually crowns of clawleaf freely lay on the ground, and leaves are stretched
towards to the sunlight. But if the herbivore will touch to them, the surprising
transformation comes: leaves start to close, folding along the middle nerve,
and simultaneously rise upwards. The plant literally before the eyes “bristles
up” with spikes. If it is not disturbed any more, in some minutes leaves take
former position again.
This plant maximally fully uses time favorable for growth. In spring clawleaf
vegetates actively, growing foliage. Not less roughly it grows under the ground.
This plant reserves water in underground tubers covered with thick peel. On
the peel there are large warts – it is not the display of disease, but the
feature absolutely necessary for life of plant. Colonies of nitrogen-fixing
bacteria live in these warts. These symbionts help the plant to receive nitrogen
necessary for growth right from air, and due to them clawleaf can settle on
poorest soils, and prospers in places where other plants decay. Growing up,
clawleaf forms affiliated tubers on long fragile stolons. When any large herbivore
(for example, bear porcupine, the characteristic inhabitant of Mexican desert)
digs ground and eats main tuber, stolons break off, and affiliated tubers,
not noticed by this animal, survive.
Soon after development of young leaves the plant begins to blossom. Flowers
of clawleaf are zygomorphic, with well advanced standard petal. They are brightly
colored – lilac with silvery strips converging in fauces of flower. Hairs have
property to reflect ultra-violet light, due to what insects notice them from
apart. This plant is pollinated mainly by bees and beetles. The nectar of flower
is hidden deeply in fauces, and to get it, the insect must creep in depth of
flower. At this moment stamens touch its back, and the insect appears strewn
with pollen. One of desert insects, cactus
hawkmoth, can simply “steal” nectar.
This moth hangs in air in front of flower, pushes long thin proboscis between
petals, and exhausts nectar, not making pollination.
Each flower blooms not for long – about four days. But this plant forms long
inflorescence on which flowers are placed in clusters, therefore as a whole
the plant blooms till two months and more. If the pollination has passed successfully,
fruits are formed approximately of third of flowers. To the moment of fruit
ripening the peduncle lies down on grass. Fruits at clawleaf are special –
each fruit contains only one large (up to 2 cm long) flat seed. Usually fruits
of leguminous plants dehiscent because of non-uniform drying of fibers penetrating
their parts. But at clawleaf the fruit is not dehiscent, and on its tip the
double bent spike covered with bristles develops. Such fruit resembles spoon-bait
with fish-hook, and on one peduncle it is total up to two tens of such fruits.
To the moment of ripening the fruit keeps on pedicel very poorly – it is ready
to meeting with animals which distribute them. Large praire
groundowl, marsupial
hyena or bear porcupine are main distributors of fruits of this plant. Having
clung to their covers, fruit of clawleaf is carried by them on large distance.
Sooner or later the animal combs it out from body covers, and fruit falls on
the ground. Near the shelter of owls or dust baths of bear porcupine congestions
of this plant form often. The seed keeps germinating capability for a long
time, and because of dense cover germination is usually delayed. It is the
expedient tactics – the plant will not sprout during the casual rain, after
which it may be some more weeks of hot dry weather, or during short-term winter
warming. At the first year of life clawleaf forms only the crown of short leaves;
for the second year leaves reach the typical size, and since the third year
of life the plant blossoms.
Gesneria-looking flowerleaf (Flosculophyllum gesnerioides)
Order Nepenthales (Nepenthales)
Family Nepenthaceae (Nepenthaceae)
Habitat: Southern China, South-Eastern Asia, tropical rainforests, rocks.
In Holocene epoch people knew some species of plants led a predatory way of
life, catching insects and small vertebrates, and satisfying in such way need
for mineral and organic substances.
In congelation epoch at the boundary of Holocene and Neocene the zone of tropical
forests had narrowed, and as a consequence of it in tropic latitudes new inhabitants
had appeared – migrants from northern and southern areas. Because of it the
competition among tropical animals and plants had strongly increased, and it
had stimulated the evolution. Animals change faster then plants, but also among
plants especially interesting species had appeared.
Flowerleaf is the epiphytic plant, the descendant of one of species of insectivorous
plants of genus Nepenthes. It is a big short-stemed grass, whose crown sometimes
reaches the diameter of one meter. Usually the flowerleaf grows at the big
height in rainforest canopy, but it oftenly settles on rocks.
Stalk of this plant is short and thick, tenacious roots penetrate deeply into
cracks of stones or into bark of tree on which this plant lives. The flowerleaf
had inherited features of leaf structure from its ancestor: the petiole of
leaf is expanded, and it has undertaken the function of photosynthesis. A leaf
plate, as at an ancestor, is modified to trapping organ. Trapping leaf of the
flowerleaf is similar to leaf of Nepenthes, but differs in greater fancifulness
of structure and action. It settles on elastic petiole bent upwards at the
right angle right after the ending of photosynthesizing part of petiole.
At the bottom of pitcher leaves the digestive liquid accumulates. But the specialization
of flowerleaves has gone much further, than at Nepenthes: turned outside edge
of pitcher trapping leaf very precisely simulates the corolla of flower of
some plants. “Operculum” characteristic for Nepenthes has especially bright
pattern.
Smelling glands and honeycups developed on the internal side of trap leaves
help to involve catch. The basic catch of flowerleaf includes rather large
insects (beetles, wasps, bees) which get into flowers in searches of forage.
Depending on the structure of the edge of catching leaf and smell some species
of flowerleaves, specializing on different kinds of catch, differ.
The mechanism of trap differs in complexity. The special bristles in fauces
serve as “sensor controls”. And in a mouth of trap leaf there is a set of other
bristles – they are elastic and have the tissue able to be swell with water.
While catch is lacking, their sharp tips are directed inside of trap leaf.
When the insect, having got in trap leaf, touches hairs in depth of fauces,
the trap works. Behind of insect elastic bristles rise, blocking an entrance
in trap leaf and blocking way to deviation. When the insect tosses in trap,
it loses forces faster. Sooner or later the victim of plant falls in liquid
at the bottom of trap leaf and is digested.
At the Gesneria-looking flowerleaf the top of leaves has bright red color with
silvery specks reflecting ultra-violet light. It resembles tubular flowers
of plants of family Gesneriaceae, and the specific epithet is because of it.
Birds, for example, tropical flowerpeckers, would like to diversify a diet
with liquid which is gathered in traps of flowerleaves, and visit them as frequently,
as true flowers of other plants.
Own flowers of flowerleaf are tiny and pinkish, gathered to ear-like inflorescence.
They have the unpleasant putrefactive smell contrasting with flower smell from
leaves. It permits a plant to not catch its own pollinators – tiny fruit flies.
Seeds are very small, carried by wind.
Close species live in rainforests:
“Rotten” flowerleaf (Flosculophyllum saprus) grows at the Sunda Land.
The top of leaves is rosy brown in the centre, and brownish-black on edges.
This species
has a putrefactive smell of trap leaves, and eats mainly beetles and large
flies involved by such smells. Flowers are white, open at night and have delicate
aroma. They are pollinated by small moths.
Narrow-leafed flowerleaf (Flosculophyllum angustatus) lives in rainforests
of Jakarta Coast. Trap leaves are very much extended (the length approximately
5 – 6 times exceeds its diameter), with a top separated to narrow “petals”.
Aroma is similar to smell of orchids. The basic catch includes bees and wasps.
Some butterflies of the hawkmoths family having especially long proboscises,
are adapted to suck digestive liquid from leaves of this plant.
Armourless paranepenthes (Paranepenthes dearmatus)
Order: Nepenthales (Nepenthales)
Family: Nepenthaceae (Nepenthaceae)
Habitat: Southeast Asia, Jakarta Coast, Sunda Land; rainforest canopy.
Among branches of trees and sprouts of various lianas of tropical rainforest
of Southeast Asia there are various species of carnivorous plants of family
Nepenthaceae - true Old World pitcher plants, and related to them flowerleaf having more specialized trapping leaves imitating flowers of some plants. But
in the neighbourhood with these plants their relative grows, which, as opposed
to these plants, had developed completely other form of relations with small
inhabitants of forest canopy. This epiphytic plant is named armourless paranepenthes.
It has long creeping stalks covered with air roots. It attaches to thickets
of moss and creeps on bark, having densely attached to layer of moss covering
it by very short sucker-like roots. The stalk of this plant reaches length
of 3 – 5 meters and more.
Leaves of paranepenthes have the shape characteristic for representatives of
family: they are large, pitcher-looking, and their volume reaches two liters.
Edges of leaves are colored dimly, and cap is wide and has long outgrowths
on edges. Leafstalks, as at true Nepenthes, had undertaken a role of photosynthesizing
organs – they are strong, expanded leaf-likely with rounded outlines.
“Standard” representatives of family use pitcher-like leaves as traps, but
paranepenthes has no nectaries and digestive glands on the internal side of
pitcher leaf (hence the name). In leaves rain water simply accumulates, and
it strongly involves various climbing animals. The plant has entered symbiosis
with them, and uses their dung and excretions as fertilizer, receiving from
them mineral and organic substances necessary for growth. Climbing frogs and
crabs living in forest canopy use these leaves as constant shelter. Besides
various mosquitoes lay eggs in leaves of paranepenthes. To use substances emitted
by its “lodgers”, in the bottom part of pitcher leaves of paranepenthes fibers
develop, with which help the plant absorbs excretions of animals. Sometimes
air roots from overlying sprouts grow gown in leaves.
The adult plant of armourless paranepenthes develops up to 20 – 25 normally
advanced leaves and turns to “apartment house” for various tree-climbing frogs
and other moistureloving animals.
Because the plant is not “interested” in insects as food source, it has adapted
to pollination by butterflies and hymenopters. Its 4-petaled flowers about
3 cm in diameter are gathered to big spike-like inflorescences. They are colored
bright pink and emit sweetish smell.
Egg-leaved
wood crassula, “egg tree” (Dendrocrassulopsis ovifolium)
Order: Saxifragales
Family: Crassulaceae
Habitat: Southwest Asia, Atlas mountains.
Ice ages are characterized by climate drying: huge amounts of water were accumulated
in glacier, the level of ocean lowers, and at the place of shallow seas land
areas appear. Evaporation of water is reduced, and as a consequence, smaller
amount of rains falls. Expansion of area of continents results in sharper temperature
contrast between coasts and land areas far from sea. In such conditions number
of moisture-loving plants is reduced, but hardy species, able to reserve water
in organs and endure cool winter climate, prosper. In Old World among such
hardy plants it is possible to note crassulas family, distinguished by significant
variety. When in ice age instead of Mediterranean sea the salt desert had appeared,
at its edges, rather free from salt, various crassulas prospered. Later, when
climate began damper, some of their representatives had got absolutely fantastical
appearance.
Wood crassula is heavy-build succulent tree with creeping trunk which is easily
taking roots in ground. Its height is not so big: about 3 - 4 meters, but the
trunk frequently reaches 1 meter thickness. Roots of this plant grow near the
ground surface and do not grow deeply in ground, but they are spread to big
area, permitting to gather rain water very fast even after the lightest rain
which had hardly moistened dust. At drought the part of roots may die off,
but in rain season they restore very quickly. Superficial root system is a
bad support for trunk of plant, therefore wind frequently fells massive plant
down. However it does not cause inconveniences to the plant: tumbled down sprouts
quickly grow roots, and tree continues life.
The bark of wood crassula is very thick and friable – it serves for thermo
isolation, protecting tree trunk from solar burns and overheat.
Leaves of this plant are thick, prolonged-spherical form, covered with thin
wax film, gathered at tops of sprouts. Their length is about 5 cm at thickness
up to 4 cm. In leaves lifted above the ground and inaccessible to the majority
herbivores, the significant part of stock of moisture, which has been saved
up by this plant, is concentrated. Besides each leaf is a pledge of original
“immortality” of plant: as well as all crassulas, this plant may multiply by
rooting of separate leaves.
This original plant lives not for long: no more than 10 years, giving for this
time a significant biomass due to leaves have taken roots on the ground and
branches grown in different sides.
Wood crassula concerns to monocarpic flowering plants, and it means, each plant
of this species blooms only once per life, and after flowering quickly dies
off. Flowering begins at the end of dry season. On each sprout ordinary-looking
white flowers open in a plenty, emitting out strong aroma. To them flies and
beetles living in desert fly basically. Flowering proceeds a long time: about
one month. For this time the irreversible exhaustion of plant begins: leaves
collapse, becoming similar on wrinkled sacks, and eventually cast. The trunk
of plant appreciably “grows thin”, on it longitudinal furrows appear, and bark
falls off by large pieces. To time of seed ripening tree is completely exhausted,
and during damp season completely decays. But seeds have fine chances to survive:
during rain season they have time to sprout and young plant may save up enough
moisture for surviving in drought.
Rock
fig (Ficus platycaulis)
Order: Urticales
Family: Moraceae
Habitat: mountains of Southern and South-Eastern Asia, steep slopes.
In human epoch figs differed in big variety of vital forms: among them it was
possible to meet trees, bushes and lianas of any size. Figs may form the original
vital form banyan: one tree, expanding in sides and giving numerous prop roots,
may form the true wood. Among figs “suppressors” squeezing by numerous roots
tree trunk in which forked crown they begin growing, and gradually suppress
and replace it in forest canopy, are also known. In Neocene among various figs
in tropics of Old World the climbing species have mastered hillsides have appeared.
Rock fig grows in conditions of plentiful rains and high temperature the year
round. This plant begins its life as an epiphyte when its small seed gets in
crack of rock where moss and vegetative dust accumulate. The sprout quickly
starts growing, clinging by rich brush of adventitious roots for the slightest
cracks. Gradually thin stalk expands and reaches next cracks where it fixes
and continues reaching upwards. Gradually stalk becomes thicker, lignifies,
and roots start to penetrate into cracks of rocks, filling and fastening them
more deeply, as if cement. The stalk of adult plant accrues more in width,
than in thickness: it is flat and band-shaped. The plant plentifully branches,
covering with itself huge areas of hillsides. The length of stalk can reach
100 m and more, and the area occupied with plant may number up to several thousand
square meters.
Certainly, such heavy green mass of a plant can not exist only due to poor
mineral feed, founded by roots in cracks of rocks. Having grown up to certain
size, rock fig lowers long crampons from rocks downwards to ground. In the
beginning it is only one thin shy root reaching to the ground. And sometimes
it must grow down to some tens meters. When it reaches ground, additional inflow
of mineral feed stimulates the further growth of plant, and some roots begin
growing to ground. Being bound and branching, they grow into ground and grow
thick, becoming similar to tangle of giant snakes.
Rock fig forms on hillsides and stony sites original “oases”, involving numerous
birds and insects. Besides the plant strengthens slopes and interferes with
landslides. Certainly, sometimes especially strong landslides tear down thickets
of this plant, but all the same the fig rather quickly restores from survived
branches.
Leaves of rock fig are small, heart-shaped and skinny. They form continuous
cover, under which various insects and spiders find shelter, and also mosses
and lichens plentifully expand. The tip of each leaf is strongly extended to
original “dropper”, characteristic for tropical plants of damp climate. In
damp hot weather it seems, that under thickets of rock fig there is a constant
rain – drops continuously fall from leaves of plant, and flow down in streams
from stones on which it grows.
Inflorescences of this species are ordinary-looking, as at all figs. These
are small green “berries” - siconiums on stalk and large branches. Rock fig
is pollinated by microscopic wasps living only in its inflorescences. Larvae
of wasps destroy a part of seeds, but staying ones will suffice for reproduction
of this plant. Ripen fruits of this species are small, red - brown, very sweet
and soft. Birds are the basic carriers of seeds of this plant. They swallow
fruits entirely, disseminating seeds of rock fig both with dung.
Mushroom-leaved begonia (Begonia fungifolia)
Order: Begoniales (Begoniales)
Family: Begoniaceae (Begoniaceae)
Habitat: Southeast Asia, rocks; epilithic plant.
Mountain slopes in Southeast Asia represent a favorable place for growth of
grassy plants had got used to be content with a small amount of ground and
moisture. Rains plentifully spill on rocks, but water quickly flows down on
them, and plants had developed the adaptations, allowing to keep and to accumulate
moisture.
Among thickets forming on rocks a species of plants, which may be easily confused
with fruit bodies of any mushrooms, frequently grows. It seems, as if among
moss the set of uniform mushrooms with green leathery pileus and the thicken
stem covered with hairs has grown. But among thickets of these “mushrooms”
thin flower-bearing stems bearing clusters of tiny pink flowers rise. These
flowers are very characteristic – thy have four petals and three-edged “winged”
ovary. They indicate to the belonging of their owner to extensive Begoniaceae
family. In Neocene some representatives of this family turned to trees, but
the majority of them remained grassy plants. The present species of begonias
is named mushroom-leaved begonia.
It is semi-succulent plant, at which aquferous tissue is advanced. Begonias
of tropical forest have large and thin asymmetric leaves. At mushroom-leaved
begonia leaf, on the contrary, is small, rounded and leathery. Its diameter
does not exceed 8 – 9 cm. Leaf of this plant has almost regular rounded outlines,
gristle-like consistence and smooth top side with slightly pressed nerves.
As opposed to the majority of begonias with bright leaves, leaves of mushroom-leaved
begonia are dim: they have dark green color with lighter border, and along
large nerves from the centre of leaf the stripes of bright green color stretch,
forming star-like figure.
The leafstalk is attached in the centre of buckler-like leaf and is the main
water-reserving organ of this plant. Leafstalks at this begonia are inflated
and similar to stalk of mushroom. They are bright green and semi-translucent;
the most part of their volume is made of water-reserving parenchyma. The surface
of leafstalk is covered with hairs that reduce evaporation.
The root system of this begonia is fibrous and consists of set of thin roots.
On stalk of plant numerous additional roots develop. During a rain this plant
soaks up water, which is quickly reserved in leafstalks. The stalk of this
plant represents thick creeping rhizome; leaves are kept only at the top part
of sprouts. Leafstalks are slacky attached to rhizome, and break off at small
effort. The broken off leaf keeps viability due to a stock of moisture in leafstalk
for a long time. At the place of fracture additional buds develop, from which
young sprouts grow. While the root system is poorly advanced, they grow due
to stocks of the moisture kept in a leafstalk.
Mushroom-leaved begonia blossoms almost the year round, except for several
weeks, when the amount of rains is minimal. It is pollinated by insects of
various species – mainly by bees and butterflies. Tiny seeds of this plant
simply spill out from the opening pods, and they are carried with wind.
Sour-leaved
begonian tree (Begoniodendron oxyphyllus)
Order: Begoniales
Family: Begoniaceae
Habitat: tropical forests of Southern Asia. Close species are expanded from
Zinj Land up to South-Eastern Asia.
In Holocene epoch exclusively perennial grassy plants had belonged to begonian
family; at some species annual sprouts died off, but large perennial tuber
was kept. Among these plants there were ground grasses (frequently they were
too sizable), grassy lianas and epiphytes. But in Neocene epoch, when the structure
of wood vegetation in tropics had essentially changed, among begonias treelike
forms, representatives of begonian trees (Begoniodendron) genus, had appeared.
Plants belonging to this genus differ in attributes characteristic earlier
for grassy begonias. They grow very quickly - the annual height increase reaches
five meters and even more. Wood of begonian trees is friable, very sappy and
fragile. Sometimes during strong winds the tree trunk breaks, but this event
does not bring a big harm to tree: one more feature inherited from grassy begonias,
ability to vegetative multiplying, has an effect. The tumbled down tree laying
on the ground easily takes roots. From trunk vertical sprouts start to grow,
and branches bend upwards. This way one tree turns to rich thicket. Through
any time the part of trunks will be choked and will be lost, but some trunks
will develop normally and gradually thickening will grow up to height 25 -
30 meters - usual height of begonian trees.
Except for it begonian trees have kept ability to multiply by rooting of branches
and even separate leaves.
Due to growth rate begonian trees are pioneer vegetation of tropical woods.
They are among first plants settling on free ground where the old tree has
fallen, or on river deposits (begonian trees are too water-resistant plants).
They grow quickly, but live not for long time: no more than 50 - 70 years if
they will not be fallen down with any storm.
Wood of begonian trees, rather soft and sappy, would be fine food for every
possible larvae of insects. But trees of Begoniodendron genus have developed
the special strategy of protection against them, having developed one of features
of their ancestors. Sap of begonian trees is true chemical “cocktail” of every
possible organic acids – malic, citric, and even formic and acetic ones. At
various species the structure of sap varies, but the principle of its action
stays constant: larvae of insects practically do not live in very sour environment,
and development of mushrooms and bacteria is essentially suppressed.
As well as grassy begonias, begonian trees differ by original oblique leaves.
They are colored not as brightly as at small grassy begonias, but at some species
on leaves there are silvery spots and downiness, and some species have graceful
dissected leaves. These are evergreen trees.
Having reached about ten years' age, begonian trees start to blossom plentifully.
Small pink four-petal flowers of these trees are gathered to large corymb-like
inflorescences. They are surrounded with two brightly colored bract leaves/
Pistillate flowers grow on ends of branches in medium and bottom part of crone,
and staminate ones blossom out basically at top of tree. If insects visit flowers
not so actively, that is chance of pollination by means of wind. Begonian trees
bloom practically all year round. Only in places with seasonal droughts flowering
interrupts at two - three months. Seeds of begonian trees are very tiny. They
are carried by wind to far distance; therefore begonian trees frequently grow
on islands of Indian Ocean.
Sour-leaved begonian tree is the typical representative of genus. Its height
is up to 20 meters. This species meets in river valleys, sometimes forming
there dense thickets. This plant endures flooding of roots during high waters,
keeping stability with the help of well advanced plank-buttress roots. The
trunk of this tree receives additional durability because it is not cylindrical,
but ridge-shaped - as five- or six-sided prism. It is connected by that this
species of trees grows in places where strong winds frequently blow. The bark
is colored grey: it protects tree trunk from overheat.
Leaves of this tree are dark green with numerous silvery spots; edges are denticulate.
Length of leaves is about 25 cm, width is up to 7 – 10 cm. Bracts are very
large (length is up to 30 cm), rounded, dark red with scarlet spots. The surface
of bracts and leaves differently reflects ultra-violet beams, therefore insects
easily notice flowers of plant. Flowers are small, light pink, gathered in
clusters of 30 – 40 ones. Fruit is three-edged pod.
Other species also belong to begonian trees genus:
“Silver
hand” begonian tree (Begoniodendron chira-argentea) is settled on
islands of Indian Ocean. Its height is up to 15 - 20 meters. Trunk is thick,
“bottle-like”, adapted to storage of stock of fresh water. The rootage is not
deep (tree avoids salted subsoil waters of islands), but is submitted by powerful
plank-buttress roots growing far in sides – they keep tree from falling during
gales sweeping over islands. Leaves are about 20 cm long, rounded, dissected
to five – six lobes, and plentifully covered with silvery hairs. Hairs serve
for protection against superfluous sunlight, and absorb water during rains.
Bark is dark grey and thick.
Flowers are bright red; bracts are pink. It flowers in season of monsoons,
at lack of moisture casts a part of foliage.
Sprouting
begonian tree (Begoniodendron proliferus) lives at the
East-African subcontinent, and inhabits tropical woods. Its height
is about 25
meters. It grows in forest wood, avoiding swampy soil. Leaves are
oblique-heart-shaped, with large jags on edge, light green with red
spots between main nerves. In place of attachment of petiole on blade
the additional bud develops. On branches especially strongly lighted
by the sun, it starts to develop in young plant. This time 1the attachment
of petiole to branch weakens, and during a storm such leaves with
young plants take off from parent tree and are carried away by wind
to many tens meters aside. Leaves of parent plant serve as sails,
increasing range of flight of young plants. Having fallen on the
ground, such offspring quickly takes roots and starts active growth.
Pink flowers are small. Bracts are very large and red-colored.
Creeping
begonian tree (Begoniodendron repens) grows in rainforests of South-Eastern
Asia, most frequently meeting in mountain woods and on steep riverbanks. At
this
tree it is impossible to tell unequivocally, what is possible to think “height”
– the main trunk of this tree in the beginning grows upwards, then lies down
and continues growth in horizontal direction. From it numerous thick vertical
trunks branch off. Such kind of growth permits a plant “to wedge” between large
trees, considerably outstripping in growth sprouts of competitor trees. To
“fix” achievements, the horizontal trunk actively grows thick. The length of
basic trunk may reach 50 meters and more, vertical trunks of 2-nd order reach
15 - 20-meter height. On river breakages the basic trunk can overhang downwards,
growing downhill up to the water, forming sometimes original natural “bridges”
across small rivers.
Leaves are large (length is up to 40 cm, width is about 30 cm), oblique-heart-shaped,
edge of leaves is wavy. The tip of leaf is strongly extended to “dropper”:
it is a common feature of plants of damp rainforest. Leaves are colored dark
green with faltering silvery strips along large nerves.
Bracts are silvery with several green spots; flowers are large and pink.
Desert cyclamen (Aridocyclamen macrotuber)
Order: Primulales (Primulales)
Family: Primroses (Primulaceae)
Habitat: deserts of Mediterranean lowland.
During millions years Africa moved to the north, aside Europe. And millions
years after human disappearance it has resulted in significant changes of environment
in Mediterranean area. When strait of Gibraltar was closed, Mediterranean Sea
had dried up very quickly, and instead of it the severe salt desert was formed,
edged by swamps with lifeless supersalt water. Drying of the Mediterranean
had considerably changed a climate of Southern Europe – it became dry and severe,
with significant seasonal and daily differences of temperatures. The desert
is crossed with some small rivers. Some of them run into swamps, and others
dry in sand. All of them have head waters in Alpine glaciers and give life
to not numerous inhabitants of desert.
Dry deserts stretch as a ribbon along edges of areas of former sea-bottom covered
with a crust of salt. These areas differ in severe climate, but nevertheless
they are populated with plants capable to reserve or to keep moisture. In desert
there is much more plants, than it seems at first sight. For desert the perennial
plants are very characteristic – these ones are ephemers, blossoming in spring,
when the ground is humidified enough with streams of water flowing from mountains.
One of the most beautiful plants of the Mediterranean desert is desert cyclamen,
the representative of ephemeral vegetation. This species is the native from
the Alpes, the descendant of European cyclamen (Cyclamen europaea). It lives
at the coast of temporary reservoirs, where the moisture in ground is kept
longer.
This plant develops within two months in spring, while ground is moistured
enough. The desert cyclamen survives in summer, autumn and winter in condition
of big spindle-like tuber. At the depth of about 40 cm, where there is a tuber,
the ground softens differences of temperatures and protects it from the majority
of herbivores. But during the vegetation the tuber literally creeps out upward,
closer to the sun. This property of a plant is connected to features of its
structure. Roots of desert cyclamen are very long. They reliably keep this
plant in ground, and have ability to twist at drying. In spring roots impregnate
moisture and push a tuber closer to ground surface, and in the beginning of
drought they contract and involve tuber deeper under ground. In foothills of
the Alpes there are populations of this species able to vegetate much longer,
rather than in desert. But this species differs in lowered competitiveness
- desert cyclamen is very photophilous plant and does not suffer shadowing.
In spring, when the ground becomes enough humid, the plant starts to grow.
Within several days it promptly develops 4 – 5 large rounded leaves (their
diameter is up to 15 cm) on long leafstalks. Leaves have a grayish shade because
of layer of wax developing on them. After that desert cyclamen begins to blossom.
Its flower-bearing stem quickly expands and reaches the height of 70 cm. No
more than 2 – 3 large flowers with petals curved back by characteristic way
keep on plant simultaneously. Flowers emit intense aroma, which becomes especially
intensive to the evening. This plant is pollinated by butterflies and solitary
wasps. Wasps especially frequently visit flowers of desert cyclamen. These
insects search on the plant not only nectar, but also gather from leaves wax
necessary for construction of nests. Flowers of desert cyclamen are pink with
silvery edges of petals reflecting ultra-violet light that helps to involve
insects.
To the beginning of summer at desert cyclamen seeds ripen. As against an ancestral
species, which seeds very quickly lost germinating capacity, seeds of this
species can keep germinating capacity till 3 years – in the changeable world
of desert conditions are not always favorable for sprouting, and the part of
shoots simply can be lost. But in ground always there is a reserve of seeds
of desert cyclamen. Seeds have strong environment on which the edible oily
appendage grows. Due to it they are pecked out willingly by birds, with which
help this species is settled. Desert cyclamen frequently grows in “oases” of
Mediterranean swamps.
Digitate wing-seeded maple (Pteracer palmatus)
Order: Sapindales (Sapindales)
Family: Maples (Aceraceae)
Habitat: warm and humid forests of Southern Europe (Balkan), Caucasus and Asia
Minor (at the southern coast of Fourseas).
In Holocene the wood flora of Europe had benn tested for survival rate. People
had cut down earlier almost continuous and impassable woods and after that
test the ice age had came. When Mediterranean Sea had dried up, and instead
of it the hot desert had formed, woods of Europe had kept only at the narrow
strip between northern tundra and rigorous salt Mediterranean desert. Woods
had remained at the south of Western Europe irrigated by clouds from Atlantic,
and also along mountain ridges of Alpes and Carpathian Mountains. Rather large
forest areas had formed in the Balkan.
When the warming began in Europe, woods had started to settle actively farther
to the north. At that time people had already disappeared and the wildlife
evolved according its own laws. In Neocene the edge of warm climate area had
moved closer to poles, but it occured not in all parts of Eurasia. Eurasia
is a huge land and the area of sharply expressed continental climate. Significant
territories of this continent are removed far from large reservoirs making
climate steady and humid, therefore at the northeast of Eurasia winter is still
cold and snowy.
At the south and east of Europe the influence of Fourseas is felt, and attributes
characteristic for tropical plants have appeared at descendants of species
of temperate flora. These features are wide and often compound or dissected
leaves with “droppers” – pointed tips. Nut-tree, chestnut, maples and sycamores
are the typical species making the European subtropical woods of Neocene epoch.
The strict competition has caused occurrence of effective adaptations for breeding
and settling.
Wind carries above crones large flat seed having two wide transparent wings.
From each capful it flies up higher ana higher, and flies to long distance.
It had fallen down from the high tree reaching 30 – 35 meters height. This
is tree of average size in European subtropical forests – it belongs to species
makinf forest canopy and does not “stick up” above it. At this tree there is
umbrella-like crone, and on flexible young branches clusters of the same winged
seeds swing.
The seed of this tree with two big wings indicates the origin of this plant:
this tree is the descendant of maple (Acer) which various species were characteristic
for Northern Hemisphere. For the characteristic form of seeds this plant is
named wing-seeded maple. At the maple the fruit consists of two seeds having
one wing is characteristic. At ripening they break up and keep in air due to
rotation of falling seed around the axis. At at fruits of wing-seeded maple
one fruit of the pair is reduced and from it only wing remained. The rest of
this seed is small scar on one side of flat disc-shaped seed having two wide
wings. Blasts carry such seeds far from parental tree. The seed is easy also
and can stay in air for a long time, reacting even slight wind whiffing.
If it will have luck to appear in place favorable for life and to sprout, eighty
– hundred years a huge tree of wing-seeded maple will develop later from it.
Trunk of adult tree of this species is straight; till the growth its lower
branches fall down. At adult tree first large branches remain at height of
20 meters from the ground. The trunk of wing-seeded maple is covered with smooth
grey bark covered whith constantly shelling small scales – such feature does
not permit this tree to overgrow by epiphytes forming in favorable conditions
“hanging gardens” weighting up to tens kilograms. Some thick plank-buttress
roots growing in the bottom part of trunk provide to it additional stability.
Such roots start to develop since the tree reaches approximately half of normal
height.
Leaves of digitate wing-seeded maple are typical for plants of humid wood:
they are dissected to 7 – 9 pointed lobes separated to 9/10 of their length
and arranged on petiole like fan. Tissues of leaves are rather soft. Leaves
grow on young sprouts in pairs, and reach diameter of about 50 – 60 cm. Young
leaves of this tree are pink with bright crimson strips along main nerves:
it is so-called anthocyan colouring protecting against sunlight. The mature
leaves of digitate wing-seeded maple are light green, but along nerves darker
zone stretches. Nerves of mature leaves are white.
This plant is semi-deciduous – in the autumn, at first cold snaps wing-seeded
maple casts approximately one third of old leaves and falls the relative rest
till 2 months. On branches only the youngest foliage remains. At the north
of area this tree can lose almost all leaves. The rest period is very important
feature of wing-seeded maple: at this time at tree flower buds are formed.
The foliage prevents pollinator insects to find flowers, therefore tropical
trees produce flowers more appreciable with the help of strong smell or bright
colouring of corone. At wing-seeded maple the inflorescence is long and carries
set of small five-petaled flowers. This tree is pollinated by bees and wasps.
Flowers are located by clusters on long peduncle hanging from branch down.
Flower of this tree is about 2 cm in diameter. It is yellow, fragrant, with
short petals and wide receptacle in which middle two carpellas grow forming
the structure similar to head of ancient key. After pollination one ovary is
reduced, and the second one develops. The wing of reduced ovary reaches the
same size as at normal ovary, and as a result one large seed with two wide
wings keeping in air for a long time is formed. It sprouts in spring and starts
to grow quickly.
Usually in underbrush many sprouts of this plant grow, but the most part of
them perishes not having found favorable conditions for life. Till the first
year of life the young plant reaches height of about two meters. First years
of life wing-seeded maple can grow in shadow of underbrush competing with other
plants, but do not receiving the necassary amount of light it starts to wither.
If the old tree closing access to light to underbrush falls, young wing-seeded
maple starts to grow quickly, aspiring to pass competitors. This tree begins
to blossom first time at the age of about forty years, having reached height
of approximately 20 meters. The maximal life expectancy of this plant reaches
400 years.
Crimson-leaved balsam (Impatiens cinnabarifolia)
Order: Geraniales (Geraniales)
Family: Touch-me-nots (Balsaminaceae)
Habitat: rainforests at the north of Meganesia, sites of broken forest stand
and riverbanks.
Symbiosis between plants and animals is more often forming relatively to pollination
of plants to which the certain species of pollinators adapts strictly, and
its presence guarantees reproduction of plant. Less often the plant forms the
shelter to insects like ants, which protect it from pest insects.
One species of grassy plants, crimson-leaved balsam, has established symbiotic
relations with the representative of vertebrate animals that is a rarity in
flora in itself. This plant entered symbiosis with one local bird, the gardener
bowerbird (Hortulornis plantarum-cultor). Two circumstances have allowed to
symbiotic relations to be established: requirement of bird for bright objects
on the one hand, and red anthocyan colouring of young leaves of plant, on the
other hand. Probably, ancestors of the present species of bowerbird originally
simply broke off such bright tops of plants and dropped them around of their
bowers for attraction of females. Tops of balsam plant easily take roots, and
this plant in many cases started to grow near constructions of bowerbirds.
Gradually evolution of bird had gone in direction of maintenance of life of
such “ornamental plants”: birds broke off sprouts of other grasses in order
to make raising bush even more appreciable and by that reduced a competition
of balsam to other plants. Besides birds tried to choose for cultivation plants
with brightest leaves. Similar relations had formed characteristic shape of
this plant.
This species of plants expands well at enough of light – in sites of broken
forest stand, and also at riverbanks. Leaves of crimson-leaved balsam have
bright anthocyan colouring – they are green with numerous red spots, and the
youngest leaflets are completely ruby-red. This species differs in fast growth
and development: from germination of seed up to the flowering less than four
months pass. If the plant develops without care on the part of bird, for this
time it grows up to one meter height and branches a little, and its leaves
in the bottom part of stalk gradually fall down. But at care on the part of
gardener
bowerbird the shape of plant is completely other: bird pinches out by beak
top of plant, and it starts to branch plentifully, turning to spherical bush
about 40 – 50 cm high. Due to branching it has plenty of points of growth,
and bright red color of young leaves it well visible on the background of environmental
green.
But symbiosis with the bowerbird has the return side: balsams belong to number
of insect-pollinating plants and presence of symbiote bird frightens off pollinator
insects, or bird simply catches and eats them. Therefore flowering of crimson-leaved
balsam proceeds exclusively at night. In axils of top leaves flower buds are
forming. They develop for a long time before will reveal only for one night.
Their pedicle is turned to spiral, having wrapped up a bud by itself. At night
the pedicle quickly starts to untwist, and in one hour is straightened completely,
taking out a flower bud above leaves. The flower with long spur and dazzling-white
petals is opened, exhaling strong sweet aroma with light putrefactive shade,
involving moths. The plant secrets a plenty of liquid nectar, and moths willingly
visit its flowers. If the flower is not pollinated, within day it literally
turns to slime and the pedicle falls off. Frequently the bird, cleaning dust,
pulls and throws out such pedicles. If pollination has taken place, the pedicle
turns to spiral again, and under covering of leaves a fruit starts to grow
ripe – dehiscent pod. To the moment of seeds ripening the pedicle is straightened
and extended horizontally. At casual touch of bird it bursts with crashing
sound and scatters seeds to the distance of several meters.
Leafless pounchstem (Gastrocaudex aphyllus)
Order: Apiales (Apiales)
Family: Carrots (Apiaceae)
Habitat: South-Eastern Europe, Balkan.
In Neocene Africa had closely come nearer to Europe. It had caused a lot of
changes in nature of Mediterranean. First of all, the result of this slow,
but steady movement was disappearance of Mediterranean Sea – strait of Gibraltar
was closed for ever, and till some thousand years the sea had completely dried
up. On the western part of saline lowland, once being a bottom of Mediterranean
Sea, severe deserts are stretched. East part of Mediterranean is the world
of saline swamps, where only creatures steady against salt can live. These
swamps are fed by streams flowing down in spring from the Alps. The second
consequence of movement of Africa to the north is a volcanic activity in Southern
Europe, and growth of Alps in height. They are still not as high, as Himalayas
are, but the first step is already made, and during the following millions
years Alps can become the highest mountains of the planet.
Narrow strip between southern slopes of Alps and Mediterranean swamps is the
area of droughty plain. Salt of the receding sea has remained in swamps, and
Alps block the way to damp northern winds. Water gets in these places in winter
as fogs, in spring as thawed snow from mountain tops. At this time for some
weeks the rich ephemeric vegetation, which spends the most part of year as
seeds, tubers and bulbs, develops here. But some plants are not afraid of cold
fogs and burning summer heat.
On clay ground the grotesque plant, partly similar to fossil plants of Paleozoic
and early Mesozoic, grows. It is not going to hide from sun and differs in
high specialization to extreme conditions of inhabiting. Thick branchless stalks
of this plant stick up from the rhizome hidden under ground and reach the height
of 3 – 4 m at thickness at the basis about 20 cm. Trunks are slightly bent
and completely lack of foliage, and internodes are inflated. This plant is
named leafless pounchstem. The plant is similar to Ottoa oenanthoides, the
plant dwelt in Andes (Venezuela) at height more of 4 kilometers above sea level,
and belongs to family common with it. Conditions of inhabiting of both species
are similar in one feature – they differ in dryness. In mountains dryness is
physiological – because of cold plants soak up water worse. And in desert it
is hot, and actual shortage of water is felt.
To save the precious moisture, leaves of pounchstem are reduced. They are present
by wide petioles without leaf plate, with advanced stipules, and exist rather
short time. Petioles and stipules are thin, turned to the kind of cap. They
serve for protection of apex, covering it from scorching beams of sun. In process
of stalk growth these caps quickly die off, but under them new ones are constantly
formed. Trunks of pounchstem have strong bark and are filled with friable water-bearing
tissue. In desert there are some species of herbivores, for example, whistlehorns.
But the plant is reliably protected from them by the weapon popular among Apiaceae
family – liquid accumulated in its stalk is poisonous and very bitter. Pounchstem
has not armed with spikes as cactuses or devil’s-milk plants (Euphorbia), but
chemical protection provides its survival.
Trunks of this plant grow from short turnip-like rhizome. As a signal for growth
ground humidifying serves. In spring from Alps streams flow down, and in desert
small temporary reservoirs are formed. The plant as if shakes from itself winter
catalepsy, and begins rough growth. Each stalk grows till some years, gradually
thickening. In nods stalk does not grow thick, therefore its trunks seem drawn
across. The young stalk has thin bark and friable tussue inside. Concentration
of poisonous substances in it is especially great: from bark of young stalk
the bitterish smell, warning herbivores that the plant is protected by poison,
is emitted. Active growth proceeds during three – four years of life of stalk.
When it grows ripe, bark hardens and turns drier, but cells of core are poured
by water and in them poisonous substances accumulate. Till first years of life
each stalk accumulates nutrients, and at the 6 – 8-th year of existence begins
to blossom.
The inflorescence of pounchstem is typically for its family – it is large (about
80 cm in diameter) umbel consisting of set of tiny white floscules. It rises
above stalks on low thick peduncle. Floscules are pollinated by insects. They
are not poisonous, and from them pleasant aroma is emitted. Seeds of pounchstem
are prickly; their environment is covered with numerous hook-like bristles.
They are carried by birds, clinging to their feathering. After ripening of
seeds trunk dries up and breaks off at the basis.
Leafless pounchstem lives up to 30 – 40 years, and starts to blossom at the
tenth year of life and blossoms annually up to the death.
Despite of poison, this plant gives food and home to some species of desert
insects. On young trunks of pounchstem water-bearing
plant louse parasitizes.
It is not afraid of poisons containing in plant, and can neutralize them. This
insect accumulates poison in body and plentifully secrets almost clean water.
This insect serves as though as natural “filter” of poison and the source of
water for some insects. Populations of this plant louse are “pasturing” by
shepherd beetle. It licks off water secreted by plant lice, and survives in
desert due to this. This beetle preserves plant lice against other insects,
feeds on inflorescences of pounchstem and pollinates its flowers.
“Toad tree” (Bufodendron toxicus)
Order: Apiales (Apiales)
Family: Ginsengs (Araliaceae)
Habitat: Southern Europe, coast of former Mediterranean Sea.
In Neocene Europe and North Africa make a whole landmass – till the Cenozoic
Africa slowly drifted to the north, and had gradually joined Europe. Mediterranean
Sea had dried up till the previous glacial epoch, and its hollow occupied by
saline swamps, is gradually narrowed in Neocene. Millions years later it can
disappear completely, having turned to highland, but in Neocene this district
is rather extensive.
Above saline swamps the zone of dry stony semidesert with separate sites of
saline lands is stretched. The desert differs in hot and dry climate, but plants
had developed even such inhospitable district.
Here and there in dried up channels of streams flew down from Alps in spring,
the unusual plant grows. This is thick tree similar to representatives of genus
Adenium, lived in human epoch. The trunk of this plant is short – the plant
does not exceed two meters in height. But it is thick and stumpy, reaching
almost one meter thickness in the basis. In top part from trunk some the same
thick branches curved upwards and in sides grow. Roots of this plant are also
very thick, tuber-like inflated in basis. The bases of roots reaching about
one meter width, surround tree trunk; therefore it seems, as if the tree has
“thawn” from drying up heat on stony ground, as if any huge candle. This plant
is named “toad tree”.
Relations of this species with plants of Holocene epoch are unusual: “toad
tree” is the succulent descendant of typical European species – the ivy (Hedera
helix). So sharp transition of one vital form to another was shown by representatives
of genus Cissus of grape family. The majority of species of these plants is
submitted by lianas, but Cissus macropus is strongly expressed succulent plant
from South Africa with tuber-like stalk.
“Toad tree” accumulates a plenty of water in friable wood and the bases of
roots. But the tree is not intended to share it with anybody at all: sap of
“toad tree” is poisonous, and it protects this plant from an encroachment of
herbivores. Bark of this plant is very friable and soft, light grey with dark
knobs, outwardly resembling the toad skin. Such structure of bark is typical
for a lot of plants living in similar places – the bark badly transfers heat
and rescues the trunk from overheat, and also rescues the plant from rare light
frosts in winter. The plant forms sprouts of two types: long-term skeletal
branches and thin annual sprouts dying off and falling with approach of dry
season. Skeletal branches accrue slowly – one meter high plant exceeds the
age of 50 years, and two-meter giants have lived for one and a half centuries.
This tree is very durable – its age may reach 400 years and more.
The relationship of “toad tree” with the ivy is more obviously shown by leaves
and flowers. Leaves of this plant grow at the time of first spring rains and
keep on plant till only about three months a year. There are two types of leaves
of “toad tree”: they differ on peduncles and vegetative sprouts. On vegetative
sprouts leaves are palmately parted with thin lobes. The shape of leaves is
the parameter of development and state of health of plant. On healthy and strong
plant leaves have five and even seven lobes. And young or very old plant usually
forms three-lobed leaves.
At the age of about 20 years the plant begins to blossom the first time in
life. “Toad tree” blossoms in winter, before developing of leaves. At this
time from Alps cold air masses move, and in mornings on places of growth of
this plant a rich fog is rising. The cold period stimulates development of
flower buds, and fog serves as stimulus for flowering. The plant flowers and
fructifies early, because to dry season its fruits must have time to ripen
and sprouts could be developed enough go through a droughty season.
Bracteal leaves differ from usual ones: they are oval-shaped with dulled tip.
They richly grow on short floriferous sprouts, forming the cover for inflorescence,
similar to heads of asters. Mean-looking floscules with strong smell are gathered
in dense cyme-like inflorescence. Their spicy smell involves small beetles
keeping activity even in winter cool. At this time food sources are very rare,
therefore insects for a long time keep on inflorescences of “toad tree” and
spend night on them, having hided in depth of cluster. Fruits of this plant
are the round grey berries covered with wax. They ripen in spring, to the moment
of migration of birds from Africa. This plant is specialized to carrying of
seeds by birds: wax reflects ultra-violet light, and ripe fruits are well appreciable
for birds. Besides berries are poisonous for mammals occasionally coming to
places of inhabiting of this plant. Birds willingly eat berries and carry seeds
in vicinities. While in ground there is a lot of moisture, seeds sprout. The
young plant forms the crown of peaked leaves and grows a long rod root. It
grows in height very slowly: in first year the “toad tree” forms small turnip-like
tuber and the crown of 4 – 5 leaves. At the fifth year of life growth of stalk
in height begins.
Palmated aepyhedera (“over-ivy”) (Aepyhedera dissecta)
Order: Apiales (Apiales)
Family: Ginsengs (Araliaceae)
Habitat: Southeast Europe, Balkan.
Warm subtropical forests are obliged by their occurrence to influence of Fourseas.
Rains from this reservoir give enough moisture for growth of forests, and Fourseas
softens climate. Forests at the coast of this reservoir have some features
of humid tropical forest. They are made of deciduous flora, and in such forests
the abundance of lianas and epiphytes is observed. At the same time, these
forests are adapted to survival in conditions of expressed seasonal climate.
The huge mountain circuit complicates communication of subtropical forests
with tropical forests of Asia and Africa. Therefore in subtropics of Fourseas
at local plants features, characteristic for true subtropical plants of a southern
origin had evolved – large size, wide or dissected leaves, long leaf tips –
dripping tips, the adaptation for removal of surplus of water.
Among lianas of European forests descendants of an ivy of several species dominate.
Some of them had remained hardy, as their ancestor, evergreen lianas with rigid
leathery leaves. They had settled far to the north and twine round tree trunks
practically in whole Europe, except for Scandinavia and northeast. Northern
species are perennial small-leaved lianas with thin lignificated stalk.
The huge descendant of an ivy (Hedera helix), small liana of historical time,
is one of dominant lianas in southern subtropical forests of Europe. The southern
ivy descendant, palmated aepyhedera, differs from small northerners – it is
a magnificent evergreen ligneous liana with thick trunk, rough bark and holdfast
roots growing at all extent of trunk. With their help thick stalk of this plant
(“Aepyhedera” means literally “over-ivy”) strongly keeps on tree trunks. It
is a perennial plant reaching the age of 200 years and more. The age of separate
rods of this species can be only a little less, than the age of environmental
trees. Aepyhedera is the giant among lianas: at adult plant up to ten stalks
more than 70 meters long can develop, entangling some near trees. The bases
of trunks lay on the ground, being bound with roots of trees and making almost
impassable sites of forest where they grow. They are covered with thick bark,
which slivers as separate plates. On trunk not only short holdfast roots, but
also long crampons develop; these ones freely hang down and reach the great
length. Reaching the ground, they grow thick, lignificate, and also deliver
an additional nutrients to the plant.
Leaves of aepyhedera are digitate and have rounded shape. As the plant develops,
leaf shape changes. At young plant leaves are small and oval. Then they become
pentagonal, resembling leaves of ivy. As the plant grows, leaves gradually
become lobed, and spaces between leaf lobes increase. The size of leaf is increased
further, and additional lobes develop. At completely developed plant the leaf
reaches diameter of 70 cm and has 7 – 9 lobes. The tip of each lobe is extended
to dripping tip, helping to excrete the surplus of water.
Having reached the stage of full physiological maturity, aepyhedera begins
to blossom. Before flowering it changes the appearance of leaves again. On
trunk the flower-bearing shoots covered with integral leaves, having the lengthened
shape and dripping tip start to develop. Flowers of aepyhedera are small, white
with yellowish shade, composed to wide cyme-like inflorescences. Their smell
is rich and heavy; it can cause a headache. Because of this feature climbing
and flying mammals do not come nearer to flowers of this plant during its flowering.
But aroma of aepyhedera flowers is very attractive to large beetles and solitary
bees which pollinate this plant. From the end of summer aepyhedera fructifies.
Its fruits are bluish-violet berries up to 5 cm in size covered with thin layer
of wax. They are poisonous for mammals, but birds eat them without any harm
and carry seeds. One of basic seed-carriers of aepyhedera is cavedove
(Cavernicolumba
strigops) nesting in Balkan caves.
Ginseng tree (Megalopanax flabelliphyllum)
Order: Apiales (Apiales)
Family: Ginsengs (Araliaceae)
Habitat: South-East Asia, Jakarta Coast; rainforests.
In human epoch South-East Asia was one center of variety of ginseng family
plants. These plants form various life forms – lianas, perennial grasses, and
also small trees. When the area of tropical forests had extended, some representatives
of ginseng family appeared in conditions of strict competition to plants of
other groups. Among ginseng plants of Neocene epoch large species of trees
reaching the age of several hundreds of years had not evolved. But they had
rather succeeded as pioneer vegetation in the damaged areas of forest.
In places, where the wood patriarch undermined by time has fallen, or where
the river cuts forest, in forest canopy extensive “window” is formed and the
sunlight reaches the ground surface. Growth of large forest grasses and also
seedlings of trees of various species here begins; they compete to each other
for the right to develop and to occupy this site of forest. Among these species
prospering within few years, there is one representative of treelike ginsengs
– the ginseng tree.
This species of plants has rather characteristic appearance. Ginseng tree is
fast-growing tree about 15 meters high, having long prickles on trunk. The
tree reaches such height within approximately six years. The trunk of this
plant usually does not branch; only at damage of top 2 – 3 lateral branches
start to develop. More often one strongest branch continues to grow, and the
others dry up and break off. But in the basis of trunk there is a plenty of
buds, from which shoots develop. Bark of this plant is lacquered brown and
shining; on young sprouts it has reddish shade. In the bottom part of trunk
the old bark exfoliates and shells by long strips between thorns. Thorns, serving
for protection against herbivores, are black with white tips. On the bottom
part of trunk a plenty of thick additional roots, serving for support, develops.
Leaves of ginseng tree also have very characteristic outlines. They are alternate,
digitate, deeply dissected to 15 – 19 long lobes with rounded tips sharply
passing to thin “dropper”. Leaves are huge: they reach two meters in diameter.
Leaf has long elastic leafstalk (up to 5 meters long); foliage forms umbellate
crone characteristic for treelike ginsengs. The leaf surface is durable and
leathery; therefore dying off leaf keeps the shape for a long time and is decomposed
rather slowly. Completely advanced leaf has dark green color with white nerves;
young leaf is reddish: it is the anthocyan colouring protecting from surplus
of sunlight.
Ginseng tree belongs to the number of moistureloving plants. It grows on riverbanks,
where the forest canopy is broken by natural way. This species especially frequently
grows on river shallows and sandy spits. This species belongs to pioneer vegetation:
it is photophilous and has low competitive ability. Till the process of settlement
of other species of plants ginseng tree degrades and is quickly superseded
by other trees. The main advantage of this species in struggle for existence
is its indiscriminateness to nutrients. In fact, seeds of ginseng tree sprout
and further the plant normally develops on sand, being content with minimum
quantity of organic substances.
In tissues of ginseng tree a plenty of biologically active substances is synthesized.
They have tonic influence and raise sexual activity at males of many species
of mammals. Therefore thickets of ginseng tree constantly suffer damage from
various animals, and even strong thorns on tree trunk do not stop them. Climbing
animals eat foliage of tree, and massive ground animals gnaw bark or feel young
trees in order to eat foliage. Even predators in courtship season do not pass
this species of trees by.
Ginseng tree blossoms annually since the third year of life. In leaf axils
hanging umbellate inflorescences consisting of ordinary-looking pale flowers,
pollinated by flies and beetles, develop. Fruits of this plant are small, but
numerous berries of dark blue color with grey wax bloom. Birds (especially
pigeons and parrots) eat them willingly, and mammals find the fallen berries.
Berries also have tonic action. Seeds of this plant are carried by animals.
“Death tree” (Necrodendron omnimortalis)
Order: Rutales (Rutales)
Family: Anacardiaceae (Anacardiaceae)
Habitat: Japan Islands, humid forests at eastern slopes of islands.
In human epoch Japan Islands were one of places where animals and plants of
tropical origin penetrate to the north, using the influence of warm sea currents
softened climate of this place. The glacial epoch marked change of Holocene
by Neocene had damaged flora and fauna of islands, having thrown heat-loving
species away to the south, and having exterminated ones could not make it.
In Neocene the new wave of expansion of southern species to the north began.
However, some relicts of Holocene managed to survive in glacial epoch, and
in Neocene they had reached prosperity in ecosystems formed anew.
Among such species there was a descendant of one Far Eastern plant – poison
sumach, or poison dogwood (Toxicodendron verniciflua). In warm and humid climate
of Neocene when literally each blade of grass has chance to turn a tree, this
plant completely realized its opportunities having turned to large tree. It
has kept and increased greatly poisonous properties of the ancestor, and deservedly
has frightening name “death tree”. If it should grew in human epoch, it would
cause set of legends, inspiring mystical horror by deadly properties. But it
grows in epoch when the Earth is humanless.
The height of “death tree” reaches 25 meters: it is rather high tree of Japan
woods. In its appearance there is a set of features of former being a bush
of its ancestor. Trunk of “death tree” is strongly waved and rough; this tree
often grows as two trunks and more which fantastically bound by branches and
grow together. Branches of this tree grow bending upwards, thus they often
overwound and weave. In common they form high egg-shaped crone, and the top
of tree looks pointed. On contrary to the name, “death tree” differs in unique
vitality: fallen on the ground, but not dead, trunk and branches easily take
roots, and the plant continues growth. Bark of “death tree” is dense and grey
with darker spots, in the basement of trunk it is dot with deep cracks.
“Death tree” grows in places where the ground layer may be rather thin. Therefore
in the basement of trunk this tree huge plank-buttress roots develop giving
to the plant additional support. On these roots dormant buds develop often,
and from them new trunks sprout at damage of root.
Leaves of “death tree” are compound and odd-pinnate, about one meter long.
Each leavf consist from 7 – 11 pairs of small peaked leaflets. Leaves are light
green with skinny shining top side and soft wrong side covered with thin hair.
“Death tree” belongs to number of plants able to move by leaves: for night
its leaves hang. They also behave the same way before the rain.
This plant has kept poisonous properties of its ancestor, and due to them is
reliably protected from herbivores at any stage of development. Transparent
viscous sap of tree is extremely poisonous: it is an adaptation against the
wood-boring vermins. On this plant only some species of herbivorous insects
live, and it is reliably protected against the majority of species of insects
damaging surrounding trees. Due to alcaloids the plant has ability to suppress
fungi growth, therefore on its trunk sponks do not settle. Wood of “death tree”
as if emphasizes the impression from plant as a whole: it is colored meat red.
Wood is so rich in alcaloids that even the dead tree is decomposed for very
long time – about three years pass before on its trunk first wood-decomposing
fungi settle.
The touch to young sprouts of “death tree” may cause a chemical sting: in young
bark of this plant urushiol alcaloid accumulates, causing skin inflammation.
Therefore herbivorous mammals avoid eating young growth of this plant. Also
for young shoots and sprouts of “death tree” have a bitterish smell is characteristic,
warning of inedibility.
“Death tree” blossoms till almost all year having a break in winter months.
Flowers of this tree are ordinary-looking and tiny, have five white petals.
They are gathered to cluster inflorescences hanging down from leaf axils down
on long pedicels. They are pollinated by small moths involved with aroma amplifying
at night. Fruits of this plant are small dry drupes surrounded by strongly
grown juicy cup-shaped pedicels of red - orange color. They are eaten by unique
species of birds – the sumach
finch. In stomach of this bird under the action
of gastric juice the environment of seeds becomes thinner and permeable. Germinating
ability of seeds passed through intestines of bird increases. But finches in
every case exterminate a part of seeds: when pedicels dry up, birds begin simply
peck seeds out from them and crush by beak. However at high competitiveness
of “death tree” the damage caused by finches is much less than benefit brought
by them to tree in seeds carrying.
In winter “death tree” falls into condition of relative rest: the plant stops
growth and casts a part of foliage. Also at it separate small branches thickened
the crone fall down. It brings to the plant considerable benefit – secretions
of decomposed foliage sterilize soil and kill sprouts of other plants.
“Death tree” is very moistureloving plant; in dry years its growth turns slow,
and the tree casts part of leaves. Till the long drought tree grown tens years
may even perish. In some degree it restrains the expansion of “death tree”
in woods of islands. At the same time this plant is sensitive to soil inundating
and perishes during strong floods from roots inundating. Therefore “death tree”
grows only in places where soil is well drained and simultaneously is constantly
damp – more often on hillsides turned to ocean. In these places “death tree”
forms the continuous thickets lasting to hundreds meters.
In continuous thickets of “death tree” only few animals live – birds avoid
this plant, and only sumach finches feel like at home among branches of this
plant. They can eat seeds and young sprouts of this tree without harm for themselves.
Strangler
sandal tree (Odoroxylon scandens)
Order: Santalales
Family: Santalaceae
Habitat: tropical woods of Southern Asia.
The sandal trees family is most richly submitted in tropical woods. Plants
leading partly or completely parasitic way of life belong to it. Some species
of these plants have suffered from cutting down by people (at least one species
was completely destroyed) because of valuable aromatic wood. After human disappearance
on Earth and global warming, when the area of tropical woods has increased,
plants of this family have returned lost positions, having formed new original
species.
Strangler sandal tree is very original semi-parasitic liana. This plant reaches
very impressive size: length of its horizontally growing trunk may reach up
to 90 - 100 meters. The plant gives set of lateral branches and expands in
width to tens meters, adhering to the majority of trees suitable to growth
in vicinities.
The plant begins life as an epiphyte: birds or insects wear out its seeds in
crown of any large tree. During the first some days sprout develops due to
spare nutrients received from parent plant. But its roots gradually start to
bore bark of tree, on which the plant has lodged. If the tree appears not suitable
for being of the host plant, the strangler sandal tree can develop long time
as an epiphytic liana. It forms sprouts reaching for nearest trees. Having
reached the next tree, sprout forms some additional roots penetrating through
bark of the tree.
If the young plant was lucky, or if sprout has to found a tree satisfying needs
of strangler sandal tree, in places of contact to bark of tree sucking additional
roots boring bark of tree and taking root in its wood are formed. Due to emitting
phytogormones the place of accretion forms original “unit” in which wood of
the host tree and this liana are “bound”. On cuts of such “units” interesting
pattern is formed; it is especially effectively looking, when wood of parasite
and host plant differs by color. At the strangler sandal tree wood has very
dark, almost beet-red colouring. It is rich in essential oils and smells pleasantly.
Oils protect plant from wood-boring insects. The trunk of the strangler sandal
tree, which has received generous inflow of additional feeding, starts to grow
in length and thicken strongly. Lateral branches reach to new trees, and soon
the big area of forest appears braided by one large plant. It is easy for noticing
among branches: bark of the strangler sandal tree is very light, almost white.
As against to some relatives, completely passed to parasitic existence, the
strangler sandal tree depends on host tree only partly. From host tree it receives
only water and mineral salts which usually does not suffice to epiphytic plants.
At this species leaves are not lost; the plant is able to independent photosynthesis.
From horizontal trunks the strangler sandal tree gives numerous vertical photosynthesizing
sprouts with characteristic oval leaves. In three - five years' age the strangler
sandal tree begins blossoming. At the tips of photosynthesizing sprouts vertical
inflorescences develop – truss of set of small pinkish flowers with strong
pleasant smell. They are pollinated by insects – basically by beetles and flies
though sometimes they are visited by wasps and single bees. This plant is monecious,
but staminate flowers blossom only after decaying of pistillate ones. Fruits
are white sweetish berries with thin skin and one large seed inside. They are
carrying by birds, sometimes fallen berries are eaten by rodents.
Mint
tree (Menthoxylon leucophyllum)
Order: Lamiales
Family: Lamiaceae
Habitat: southern slopes of Himalayas, the north of Hindustan, tropical forests.
Plants develop the most various ways for protection against insects: some of
them form a plenty of fibres, others are protected with the help of poisons,
and third ones enter the favorable unions with enemies of their enemies. One
of representatives of Neocene flora, the mint tree, had chosen way of perfection
of chemical protection. This plant accumulates a lot of menthol and various
alkaloids in leaves, reliably having protected itself from many pest insects.
Certainly, there are some species
of beetles, adapted to eat leaves of this species, and even using substances
received from tree for protection against their own enemies, but nevertheless
their number is much less, than could be, if the mint tree should not have
means of chemical protection.
Mint tree grows on mountain slopes, opened to wind and sun. During evolution
it has adapted to life on well lighted places, forming at times continuous
thickets in favorable conditions. From height of bird's flight thickets of
mint tree are well appreciable on the background of environmental wood: at
this tree the foliage has silvery shade. For protection against the sunlight
leaves and young sprouts of plant have rich silvery downiness, reflecting surplus
of sunlight. Leaves of mint tree are rather large (their length is about 30
cm), oval-shaped with denticulate edges.
Mint tree is one of trees of the first size in Asian woods. Its height is up
to 50 meters. This tree grows very long time: duration of its life can reach
300 years and more. Wood of mint tree is very firm, pleasantly smelling on
break: it is literally impregnated with menthol for protection against wood-boring
insects.
But the mint tree has concluded the favorable union with pollinating insects:
its flowers are simply irresistible for every possible butterflies and bees.
Tubular flowers of this tree are gathered to long inflorescences rising vertically
on tips of branches. Each inflorescence numbers up to fifty such flowers. Colouring
of them is rather ordinary-looking: perianth is pale lilac. The fauces of flower
is opened, and the lower lip represents fine “airfield” for insects. All secret
of appeal of flower is inaccessible to sight of vertebrates, but involves insects
from apart: internal parts of flower reflect ultra-violet light, and on lip
in ultra-violet light the strip is appreciable, indicating to insect a way
to nectar.
Except for ultra-violet pattern, flowers involve insects with strong pleasant
smell with a shade of mint. Fruits of mint tree are dry pods with firm seeds.
On tips of seeds hooks, assisting them to cling to wool of animals, wandering
under tree, grow.
Except for seeds, the mint tree can breed by root offsprings: on the surface
of thin lateral roots there are buds sprouting at damage of root. So at some
distance from adult tree young trees of the same species appear. When the parental
plant falls because of old age or hurricane, young growth grow competing in
speed, and soon in a wood the whole group of high trees with silvery foliage
is formed.
Alien rootflower (Rhizoflosculus xenos)
Order: Scrophulariales (Scrophulariales)
Family: Figworts (Scrophulariaceae)
Habitat: forests of South-Eastern Europe (southern and western coast of Fourseas)
In Holocene among representatives of figworts family it was a plenty of species
which leaded semi-parasitic habit of life – they were attached by underdeveloped
roots to root system of other plants and received through them mineral substances
from ground. But they kept green leaves, and looked externally like other most
usual grassy plants. Also in family true parasitic species were represented
in small amount.
In Neocene the tendency of passing to parasitic habit of life had amplified
at them. It was favoured with changes of climate resulted in formation of new
productive ecosystems. Humid subtropical woods at the coast of Fourseas became
a habitat of new species of parasitic plants.
On roots of high trees of European subtropical woods it is possible to see
flowers of this plant, hence it has received the name rootflower. This parasitic
plant has no own green leaves and lives practically completely due to the host
tree. Its relations with host tree develop originally: it is parasitism inclined
to symbiosis. The rootflower exists the most part of year as tissue bundles
under bark and in thickness of wood of host tree. Its presence causes fantastical
knotty inflows on roots and bottom part of trunk (not higher than at one meter
above the ground). But the most interesting fact is that at rootflower its
own root system is very well advanced. Evolution had made an original step
back: first the plant had “attached” to host tree and became dependent on it,
and then relations of parasite and host began to develop to absolutely another
direction. Under the ground rootflower develops rich circuit of roots connected
to mycelium of various species of local fungi. It brings huge benefit both
to parasite, and its host: the host tree receives from rootflower mineral substances
from ground, but in exchange the parasitic plant takes a part of organic substance
synthesized by the host. Vascular system of host and parasite plants interlace
inside knot-like inflows on trunk which in due course strongly expand. The
rootflower can parasitize at the plenty of species of deciduous trees of European
woods. It avoids only plants on which lianas of family Araliaceae, descendants
of ivy, grow. Obviously, the substances emitting by these plants oppress sprouts
of rootflower at early stages of development.
In summer on inflows formed of tissues of parasite and also on roots of the
host tree flowers of this plant form. Two strong gristle-like bracts punch
bark of the host plant and open, letting outside a single flower. Flowers of
this parasitic plant are large – the diameter of flower reaches 4 – 5 cm; they
also are numerous – at one square meter up to several tens flowers blossom.
Flower of rootflower is bilabiate with perianth extended to tube, bright yellow
with lilac “ocula” in the middle. The top petal is covered with silvery hair
reflecting ultra-violet light, which develop in longitudinal strips converging
in fauces of the flower. It is the original “sign” for pollinating insects.
They are involved also with strong aroma with slight putrefactive shade. Flowers
of this plant are pollinated mainly by single hymenopters though occasionally
they are visited by butterflies. Petals of rootflower are densely closed and
only the strong insect can move them apart, therefore small casual pollinators
like flies can not reach nectar. Butterflies with long proboscis, large species
of diurnal hawkmoths, may simply penetrate thin proboscis between densely closed
petals and drink nectar not making pollination.
The fruit of rootflower is very original – in it the “constructive decision”
of plants of Cucurbitaceae family known as squirting cucumber (Ecballium elaterium)
was independently developed and repeated. Ripen fruit of rootflower is rounded
pod about 3 cm long, filled with liquid in which ripen seeds float. The liquid
is under high pressure. The fruit is opened with the help of small cover at
the tip. When large animal casually touches fruit, it “blows up” and throws
to the animal sticky liquid with seeds. Seeds of rootflower are tiny; they
easily stick to wool and are carrying by animal to other places. When animal
rubs against trees, seeds remain on bark and sprout. Sprout of rootflower is
very delicate and sensitive: phytoncides emitted by other plants easily suppress
it. Therefore rootflower meets in woods of Europe rather seldom. If the species
of host tree is suitable for rootflower and nothing interferes with development
of parasite, the sprout takes root under bark of tree and expands. Till first
years of life it develops in ground thin roots, searching for mycelium and
forming mycorhiza. In this time at the bark of host tree characteristic outgrowths
start to form. Having reached about ten years' age, rootflower begins to blossom.
Veey's root (Sublathraea wiyii)
Order Scrophulariales (Scrophulariales)
Family Figworts (Scrophulariaceae)
Habitat: forests of South-Eastern Europe (southern and western coast of Fourseas)
In Holocene at the territory of Australia people had discovered two species
of orchids distinguished by original way of flowering – cryptanthemys (Cryptanthemys
slateri) and rhizantella (Rhizanthella gardneri). These both plants were lack
of chlorophyll. They grew and blossomed under the ground. Even at the moment
of discovery these both plants were extremely rare. The Cryptanthemys orchid
had become extinct in historical epoch, and Rhizanthella had vanished after
it at the epoch of anthropogenous pressure despite of protection efforts.
In Neocene epoch at Earth one more plant leading underground life and even
blossoming under the ground had appeared. It is the descendant of toothwort
(Lathraea squamaria), the parasitic plant of figworts family. In Holocene epoch
this plant had lost chlorophyll, and in Neocene specialization of its descendant
had reached the top. The descendant of toothwort is completely underground
flowering plant, Veey's root.
Veey is the underground monster at Slavic myths, which appears on the ground
only once in four years, February, 29, and was able to kill by sight*. According
tales Veey spent all rest time under ground. The Neocenic plant growing in
forests at coast of Fourseas leads equally secretive underground habit of life.
The Veey's root is a parasitic plant which grows under the ground the most
part of year. This species parasitizes at bush plants of birches family (Betulaceae)
living in underbrush. Veey's root prefers mellow soft ground, and grows near
riverbanks or in valleys, where the ground is mellow and humid enough. Obviously
it is connected to optimum conditions of growth of its hosts.
At Veey’s root there is lack of chlorophyll, and its leaves had turned to thick
scales. The body of plant is creeping rhizome about one meter long, growing
at the depth of 20 – 30 cm. The root system of plant is reduced up to several
sucker roots, with which help the Veey's root attaches to roots of host plants.
This parasitic plant completely depends on the host.
In summer when ground is warm and damp, and the host plant vegetates actively,
Veey's root begins to blossom. This event cannot be seen without any special
efforts, because Veey's root even blossoms under ground. But inflorescences
of this plant may be found out guiding at the characteristic smell involving
pollinators.
Veey's root forms inflorescences in axils of scale-like leaves densely covering
the rhizome. The inflorescence develops in wrapper of several strong juicy
opposite leaves. They protect flowers against damages. The wrapper “bores”
the ground thickness and slightly opens at the tip, having reached the ground
level. At ripening flowers the wrapper of inflorescence expands in width, forming
the chamber in which plant pollinators get.
Flowers of Veey’s root do not differ in refined form - they involve pollinators
not with appearance, but with smell. At them there are reduced petals and pale
grey colouring with pinkish shade. Each flower is surrounded with two big bracts.
Flowers densely sit in longitudinal lines on thick rachis of inflorescence.
Aroma of flowers of this species is strong and sweet with putrefactive nuance.
Veey's root is pollinated by ground beetles involving very much with such smell.
On inflorescences of Veey’s root it is possible to see often small ground snails
and slugs also involved with smell of blossoming plant. They do not play an
essential role in pollination, but can eat a significant part of ovaries. The
plant is escaped from damages by its basic pollinators – beetles: many beetles
feeding on inflorescences of Veey’s root are carnivorous and hunt molluscs.
After pollination, shortly before seed ripening, the plant of Veey's root is
shown at the ground surface. The rachis of inflorescence is strongly extended
and lifts ripening fruits to the height about one meter above the ground. Fruits
of Veey’s root are dry pods opened by small operculums on tips. When the wind
shakes the plant, through apertures tiny seeds carrying by wind run out. In
one pod it may be some thousands of small seeds.
The seed of Veey’s root sprouts at once having got on the ground. The sprout
searches for chemical substances – secretions of roots of the host plant, and
grows directly to these roots. Usually significant part of sprouts perishes
not having found suitable place for life. The Veey's root develops slowly:
from germination of seed to the first flowering over 10 years may pass.
---------------
* Note for foreign readers about Veey: this monster is described like very
stumpy-built human-like creature with long and heavy eyelids. It is not able
to lift them, and demons do it using pitchforks. The glance of Veey is harmful
and deadly for all live beings. Veey spends almost all life in caves or in
other holes.
Uzambarian snowleaf (Niveophyllum usambaricus)
Order Scrophulariales (Scrophulariales)
Family Gesneriaceae (Gesneriaceae)
Habitat: Uzambara Mountains (Zinj Land).
Gesneriaceae is one of characteristic families of plants of tropical zone.
In Holocene epoch it was presented by extremely grassy plants of different
habitus - from tuberous perennial plants and evergreen epiphytes up to annuals
and monocarpic grasses with unique leaf. In glacial epoch the specific variety
of this family had considerably suffered because of reduction of the area of
suitable for inhabiting places of tropical zone. But in Neocene when evergreen
rainforests had widely distributed at Earth, these plants had received
a new opportunity for evolution, and used it maximum full.
Neocenic Gesneriaceae had occupied even such habitats which were earlier inaccessible
to them. One of such atypical representatives of family lives in mountains
of Zinj Land. When the African continent had splitted along the line of Great
Rift Walley, and its eastern part had broken away, the highest mountains of
Africa had ceased to belong to the continent. Live creatures had stayed on
Zinj Land, began to evolve irrespectively to continental species.
It is rather low plant – up to one meter height. Its vital form is uncharacteristic
for family: at it there is thick lignificating trunk. At top of trunk the crown
of wide leaves covered with white downiness is stretched. Young leaves are
haired especially rich: it seems, that snow lies in the middle of plant. For
this feature the plant has received the name “snowleaf”. However this species
do not grow where the true snow falls: snowleaf has kept relative heat-loving
characteristic for family. The ancestor of this plant is the species widely
known in human epoch as “African violet” (Saintpaulia ionantha).
The shape of this plant is somewhat reminiscent some huge species of lobelias
(Lobelia) dwelt in mountains of Africa in human epoch. The trunk of snowleaf
is covered with leaves only in the top part where they form the wide crown.
The basis of trunk is environmentproofed by friable spongy bark which softens
difference between day time and night temperatures: at night in habitats of
snowleaf it happens rather cool, and occasionally even there are light frosts.
Therefore such protection is very useful for this plant. If light frosts are
too delayed, old leaves die off, but do not fall off, and remain on trunk as
additional thermal isolation. But some of young leaves most richly covered
with silvery hairs, always survive, and the plant is quickly restored after
colds.
If light frosts appeared too strong, the plant does not perish all the same:
at the basis of trunk of snowleaf from dormant buds young crowns of leaves
develop. In due course they expand, forming additional trunks, and form new
crowns. So for some tens years the single plant can turn to thicket with several
tens trunks.
Almost the year round snowleaf blossoms, making a break only in coldest time.
Flowers of snowleaf are gathered in big inflorescence numbering up to 20 flowers.
Flower is long, tubular, white with strong smell. In fauces of flower there
is a pattern of small red spots merging in depth of flower to one spot. Flowers
of snowleaf are opened constantly, but their specific spicy aroma is not almost
felt in the afternoon, but amplifies by night. At this time tiny
bats eating
exclusively nectar of plants fly to the feeding. They should not fly far for
the forage: they live under leaves of snowleaf where they have the convenient
warm dwelling protected from wind. The same animals pollinate this plant. Peduncle
is very strong, and bats licking nectar can simply jump from one plant to another.
Fruit of this plant is small dehiscent pod with very small seeds which are
carried by wind. Sprouts of snowleaf are very weak and delicate, and the most
part of them simply perishes among grass. But some sprouts succeed to survive
and grow up. One more way of breeding of snowleaf is vegetative breeding with
the help of leaves. Leaf of plant broken off by wind or animals can easily
take roots in ground and give some young plants.
Right-sided asymmetrocalyx (Asymmetrocalyx dexter)
Order: Scrophulariales (Scrophulariales)
Family: Gesneriaceae (Gesneriaceae)
Habitat: humid tropical forests of Amazonia, forest canopy.
Tropical forests of Amazonia in congelation epoch had gone through an extreme
degree of decline – their area at some stages of congelation broke up to a
number of isolated islets where only small part of former variety of their
inhabitants was kept. After deviation of glaciers, when the climate became
warmer again, rainforests had formed a continuous cover in northern half of
South America. A variety of rainforest inhabitants of Neocene has caused a
competition, and strict specialization as its consequence. Flowering plants
began to develop various ways of attraction of pollinators, leading up them
up to various degrees of refinement. Some flowers are hospitably open to all
pollinators, and others give nectar only to those ones, which are adapted to
extract it. Representatives of Gesneriaceae family belong to the plants pollinated
by birds and insects. Representatives of one genus of these plants evolved
long time in common with the special genus of hummingbirds, and indestructible
connection between bird and plant species became a result of this evolution.
Flowers of this species of Gesneriaceae have long tubular nimbus with bright
limb, hiding nectar from strangers by simple way: it is bent sideways. For
this feature plant has received name Asymmertocalyx (“an asymmetrical calyx
of flower”). The bend can be both to the right, and to the left, and two species
of this genus of plants realized both variants of a structure successfully.
These species differ from each other in habitats, and their pollinators also
do not meet in common with each other.
Both species of these plants are epiphytes living in forest canopy. In tropical
forests of Amazonia right-sided asymmetrocalyx lives; it is the species, at
which tubular nimbus bends to the right. The inflorescence at this plant is
a long ear on strong vertical flower-bearing stem, and the axis of inflorescence
is spirally twirled. Flowers grow in pairs on short stems in axils of wide
rounded leaflets. In one node of flower-bearing stem, thus, four flowers grow.
Flower-bearing stems of this species are covered with rich white hairs – it
is the “family feature” of Gesneriaceae.
The length of flower tube is about 5 centimeters that approximately corresponds
to the length of beak of the humming-bird pollinating this species. For attraction
of the pollinator bird the limb of nimbus has bright red coloring with strips
of silvery hairs stretching from edges to the pharynx of flower. Diameter of
the flower of this species is about 2 centimeters. A fruit of asymmetrocalyx
is rounded dry pod dehiscent in casual direction. Smallest seeds are supplied
with cops need for flight.
Asymmetrocalyxes are perennial plants with strong creeping stalks. They attach
to bark of host tree - by set of thin roots, and the beard of white roots gathering
dew and rain water hangs down in air. Leaves of right-sided asymmetrocalyx
are dark green, relief and impressed. They are not so large, leathery and having
a small amount of hairs on top side. Leaves are gathered in dense crowns, and
during the rain they direct rain water to roots.
This plant is pollinated by bacororo hummingbird, or left-sided
crookbill hummingbird (Asymmetrochilus bakororo), which beak is adapted to extracting of nectar from
such flowers. Fitness of asymmetrocalyx to pollination by hummingbird is not
absolute – some large butterflies also can extract nectar of this plant, having
turned sideways. And bees simply gnaw through tube flower, and also extract
nectar, passing a bend of flower nimbus.
The related species – left-sided asymmetrocalyx (Asymmetrocalyx sinister) –
lives in cool foggy forests on mountain slopes. This species has adapted to
life in conditions of high humidity and cool climate. The whole plant is covered
with intensive white downiness, which detains drops of dew, protecting leaves
from rotting. Numerous short air roots gather moisture from the surface of
plant. They develop even on flower-bearing stems, from the same node, as leaves.
Flowers of this species are carmine-pink and larger, than at rainforest species
– their diameter is up to 5 cm. Left-sided asymmetrocalyx is pollinated by
itubory, right-sided crookbill
hummingbird (Asymmetrochilus itubory). But also
this plant can settle effectively with the help of vegetative breeding – on
tips of its large leaves brooding buds with short leaves and hairs modified
to hooks are forming. The brooding bud clings to plumage of birds and easily
breaks off parental plant, and birds carry such buds in forest, leaving them
in places which may be suitable for growth.
Fly-catching tomato (Neolycopersicon
muscicarpus)
Order: Polemoniales (Polemoniales)
Family: Solanaceae (Solanaceae)
Habitat: South America, light forests in tropical and subtropical areas.
In human epoch South America was known as the centre of variety of tomatoes
(genus Lycopersicon). Among these plants there were the species adapted to
various habitats: for example, at Galapagos Islands one halicole species lived.
The species had not been entered by people to agriculture appeared hardy enough
in order to go through epoch of anthropogenous pressure and global ecological
crisis at the boundary of Holocene and Neocene. In Neocene some descendants
of tomatoes had got surprising adaptations for survival. People managed to
select cultivars of tomato, which protected against small insects independently,
keeping them with the help of sticky hairs. The descendant of one South American
species of tomatoes developed the same ability independently of such tomato
cultivars, but it had promoted in this feature even further. From the simple
protective adaptation at this plant sticky hairs had turned to hunting instrument
– the plant specially involves and catches tiny insects and mites. This species
of plants is fly-catching tomato.
This plant catches insects not only to protect itself from harm. This species
had adapted to life on poor ground, and its well-being depends on presence
of insects. The fly-catching tomato exhausts the caught animals, receiving
in such way necessary amount of mineral and organic substances. Hairs on its
leaves have a special structure. Each hair represents a huge cell with strong
covers. On the tip of hair the drop of sticky substance is secreted. When the
insect lands on leaf and sticks to hairs, substances emitted by its body stimulate
growth of tip of hair into the tissues an insect. The hair sprouts into the
body of prey as a chain of thin-walled cells, which absorb its liquid contents.
The plant consumes tiny soft-bodied insects – plant lice, thripses, small caterpillars
and maggots – especially successfully. After nutrients will be absorbed, the
hair dies off and withers, and the wind carries away devastated exoskeleton
of insect. The young leaves richly covered with hairs catch insects more successfully.
They are reddish because of anthocyan pigment protecting them from solar burn.
For attraction of insects on some hairs drops of sweet liquid are secreted.
This plant is positioned at early stage of specialization to feeding on insects
and yet has no adaptations permitting to keep prey actively.
The first leaves of young plant are rounded, but on next leaves denticles at
edges appear, passing later to deep cuts. Completely generated leaves are pinnatisected,
dark green, slightly sticky and velvety to the touch. On adult leaves trapping
hairs remain only on lateral lobes and on the edge of leaf. All parts of plant
are protected from herbivores by alcaloids and have a specific smell.
Fly-catching tomato is a perennial plant. At the first year of life its stalk
is vertical, but later it becomes ascending and takes roots in nodes. Lateral
sprouts and top rise vertically, and the plant forms the dense thicket. This
plant is pollinated by insects, and, in order not to catch casually its own
pollinators, it moves flowers highly upwards on long flower-bearing stem. Flowers
of fly-catching tomato are small, five-petaled and similar to flowers of the
majority of Solanaceae. Petals grow together to short tube, and white peaked
tips of petals are turned back. Fruit of this plant is small red berry. In
ripen condition the fruit of plant is edible, and it is eaten willingly by
large ground rodents.
Some species of bugs and beetles are adapted to “robbing” of this plant: they
seize stuck insects from its leaves.
New Azora banana plantain, “Azorean banana” (Neomusa plantagoidea)
Order: Plantaginales (Plantaginales)
Family: Plantains (Plantaginaceae)
Habitat: New Azora, mountain areas of island.
The flora of islands in human epoch differed in presence of set of endemic
species of grass plants which had turned from small species to giants of plant
kingdom. At Hawaii treelike geraniums and lobelias lived, and at Saint Helena’s
Island huge species of plantain Plantago robusta dwelt earlier. This plant
had even received the name “St. Helena’s banana”. But the destiny of these
species was not surviving after human extinction. Many species, including giant
plantains, had died out, despite of human efforts of their preservation. In
Neocene flora of islands new species of giant plantains had appeared, but they
are not related to the similar species known in human epoch.
In mountain areas of New Azora one of such species of plants grows. This plant
is a little similar to banana, but differs from it in rounded leaves with arc
nervation. Because of similarity to banana the plant has received the name
“Azorean banana”, and is officially named New Azorean banana plantain. However
at the closer look at this plant the set of differences from the prototype
of human epoch is appreciable. While the “trunk” of a banana was formed by
petioles of leaves, at New Azora banana plantain there is true trunk – thick
rhizome. It grows vertically, and can thicken and branch till the growth. It
is covered with fibrous rests of leaves and rough bark protecting from damages.
Under the ground surface thin rhizomes of other type stretch: they can bend
upwards at any distance from parental plant and form new vertical stalks. Trunks
of this plant are fibrous, elastic and rigid. The height of New Azorean banana
plantain usually does not exceed 1 meter, but in remote mountain areas giants
grow – long-livers about 2 meters high.
Tops of rhizome stalks of this plant are topped with crowns of wide oval leaves
of dark green color on thick petioles. Leaves are downed with short rich hairs
of grey color. Young leaves have especially rich downiness, that’s why the
middle area of tuft looks silvery. The length of completely formed leaves of
adult plant reaches one meter.
Approximately since the fifth year of life the stalk starts to form inflorescences.
The inflorescence is formed in apex. It is the spadix characteristic for plantains
covered with numerous small floscules. The height of inflorescence may reach
one meter at the same length of peduncle. This plant is pollinated by insects;
especially frequently on flowers of New Azorean banana plantain it is possible
to meet beetles and various wasps. Small birds, and occasionally even bats
fly to these inflorescences to feed on nectar, but they only incidentally participate
in pollination of “Azorean banana”.
Fructification of New Azorean banana plantain is very interesting: when flowers
are pollinated, the axis of inflorescence starts to grow thick, and the peduncle
bends to the ground. Ovaries are immersed in expanding axis of inflorescence
and become covered by dense environment. The pulp of inflorescence axis becomes
friable and sweetish by taste, and thin skin gets bright orange color. Such
inflorescence forms infructescence similar a little bit to pineapple one by
the principle of formation. Seeds of this plant local gallinaceous birds –
rock Azorean partridges – distribute. Birds peck infructescenses falling to
the ground. Seeds, passing through the stomach of bird, not only do not perish,
but even raise germinating ability: because of action of gastric juice their
environment grows thin, that helps the germ to receive water and the mineral
salts necessary for germination and development. The dung of birds gives the
additional top dressing necessary for growth. But reproduction of this species
is braked by small birds, which frequently peck off unripe ovaries from growing
infructescenses.
After fructification growth of stalk stops for some time. When infructescence
starts to ripen, near the basis of peduncle the new apex is formed, and strong
stalks occasionally start to branch.
“Azorean banana” grows slowly: large plant can reach the age of 120 – 130 years,
and the general life expectancy reaches 200 years and more.
Spiniest
astreca (Astreca spinosissima)
Order: Asterales
Family: Asteraceae
Habitat: Northern Africa, border of Mediterranean swamps.
Drying in late Holocene Mediterranean sea has essentially affected climate
of districts surrounded it earlier. The territory of former Mediterranean began
more droughty, and wind from Mediterranean hollow carry clouds of salt dust
sedimenting far in depth of continents. In such conditions not all plants can
normally exist, but some species adapted to such conditions prosper.
At the former African coast of Mediterranean sea among sickly grass groups
of interesting plants about 2 meters height grow here and there. At first sight
they are similar to small palm with prickly trunk, but, at more close look,
it becomes evident, that it is not a relative of palm at all
This fantastical plant is spiniest astreca, one of inhabitants of droughty
districts surrounding Mediterranean lowland. The name “astreca” is made of
words “aster”, a plant showing belonging to family Asteraceae, and “areca”
that means “palm”.
The thick succulent stalk of astreca has five longitudinal sharp edges, and
its cross cut is similar to star. Each edge is plentifully bristled up by sharp
strong spikes reliably preserving plant against large herbivores. Stalk poorly
branches, giving from the basis two - three large lateral sprouts. Trunks of
astreca are covered with dense thin skin partly lignifying in the bottom part.
But spikes on trunk are not the main feature of astreca giving to it “palm-like”
shape. Stalks of this plant are topped with crown of dark green pinnate leaves
about one meter long. Along the middle nerve of leaves light silvery strip
passes. Under alive leaves the rests of dried up last year's leaves hang down
like fringe – though they are dead, they still play the vital role, protecting
stalk from sun burns. Each leaf from above and from below along main and large
lateral nerves has lines of sharp thin spikes – it is the reliable weapon against
teeth of gluttonous herbivores. Died out leaves do not fall down also because
their spikes so regularly take part in protection of plant.
On the bottom surface of leaves silver-white hairs richly grow, giving to wrong
side characteristic felt-like structure. Such adaptation helps to evaporate
water in less quantity: stomas are on the bottom side of leaves, and hairs
soften contrast between medium inside leaves and drying up heat outside.
Plants of family Asteraceae are champions of vegetative multiplying. At meter
depth under ground astreca forms an extensive circuit of rhizomes on which
offsprings are formed. Therefore one plant in suitable conditions quickly expands
to original thin grooves.
During short rain season astreca grows quickly. For some months the plant increases
up to 20 cm in height, and forms about two tens large leaves. In conditions
of plentiful humidifying on old 7 - 10-years trunks peduncles develop. Inflorescences
of astreca are small yellow heads of hermaphrodite flowers, surrounded with
dry reddish-brown leaves of inflorescence covers. Heads are gathered in large
common corymb-like inflorescence on long peduncle. It develops on top of old
trunk of plant and is visible from apart. Solitary wasps and butterflies pollinate
astreca basically, though occasionally it is possible to see beetles and flies
on inflorescences of plant.
To the beginning of dry season seeds of astreca ripen. After their ripening
the stalk of plant given a peduncle, dies off. But near it the young growth,
which soon will get stronger, already grows up.
In desert there is not so much animals may become seed carriers, therefore
astreca had selected simple vital strategy, characteristic for set of plant
species: its seeds are carrying by wind. Tiny seeds of astreca have white parachutes
with which help they are carried at the big distance. In such way astreca was
settled on all coast of Mediterranean swamps, and even grows on some mountains
of Mediterranean lowland, having formed some well differing species.
Seeds of astreca keep germinating ability for a long time, waiting for favorable
conditions till some years. After rain they sprout quickly, and young sprout
starts to form the crown of leaves on ground surface, and its long root reaches
to damp deep layers of ground. For the second year of life the elevated trunk
starts to form, reaching full development to 10-years age. At the third year
of life plant starts to form horizontal rhizomes from which new offsprings
grow in various sides.
In Northern Africa, on islands of Mediterranean swamps and in Southern Europe
some related species of this plant live:
Astrophytum-like
astreca (Astreca astrophytoides) is the inhabitant
of dry mountain areas of Mediterranean lowland. It differs
by short thick trunk (height of plant is about half meter)
with large fleshy edges covered with short spikes. The form
of trunk of this species of astreca resembles cactus of genus
Astrophytum. Leaves are narrow, densely downed from below,
covered from above with numerous sharp hairs.
The peduncle is very short, inflorescence consists at all from 3 - 4 heads
of yellow flowers with pink dry leaves of cover.
More often this species meets in cracks of rocks by small groups, avoiding
salt soils.
Palm-like
astreca (A. palmetto) meets in Northwest Africa, at
the Gibraltar isthmus and in Southern Europe. Living in rather
damper conditions, this species is characterized by high trunks
(up to 5 meters height), a plenty of long narrow leaves (length
about 1 meter at width about 10 cm). Leaves are pinnatilobate,
on the tip of each lobe sharp spike sticks up. Trunk is 5 -
6-edged; edges are narrow, slightly wavy, covered with single
long spikes.
The peduncle is long (up to 1 meter); it carries a plenty of small heads with
white cover leaves.
This species meets in separate groups lengthways of riverbeds and near temporary
reservoirs, preferring relatively humidified ground.
Giant desert daisy (Taraxacaulis crassiradix)
Order: Asterales (Asterales)
Family Asteraceae (Asteraceae)
Habitat: semi-arid areas of Mediterranean lowland.
Rigorous conditions of life result in occurrence in animals and plants of the
various adaptations permitting them to survive. In the epoch previous to Neocene,
climate of Earth was rigorous and contrast, having caused to life set of
species of live organisms adapted to extreme conditions. In Neocene the climate
began much softer, and species adapted to rigorous conditions of inhabitancy
have started to die out. But even in Neocene on Earth places with very
rigorous conditions of life were kept. They became original “reserves” and
“ranges” for the plants living in extreme conditions, and in these places evolution
has continued “to perfect” their adaptation. One of such areas is the district
around of former Mediterranean sea which has turned to congestion of salt swamps
and lakes in huge hollow had being earlier its bottom.
In epoch of large geological or climatic cataclysms the most undemanding and
widely widespread species survive with the greater probability. Therefore it
is no wonder, that an ancestor of one of interesting plants of semi-desert
at the edge of Mediterranean bogs was the usual dandelion (Taraxacum officinalis).
However, in human epoch classification of dandelions to species was the extremely
uncertain because of wide variability of these plants. Obviously, the pledge
of success of these plants in Neocene also had been hidden in it.
The descendant of dandelion, the giant desert daisy, lives in droughty areas
of Asia and Northern Africa, preferring stony and clay ground. It represents
stalk-less grass, being somewhat reminiscent of the ancestor. At this plant
leaves are much larger, than at dandelion: about 30 - 40 cm long with thick
main nerve and pinnated edges. On angular lobes of leaves along the edge thin
sharp spikes stick up. The bottom surface of leaves is covered with grayish
felt film of hairs; top is glossy. Young leaflets are richly covered with hairs
even from above, but in process of development of leaves downiness remains
only on the bottom surface. Leaves lay on the ground as wide crown, and last
year's leaves can remain on plant one - two years more, protecting plant from
herbivores, and ground under it from overheat.
On depth of approximately one meter under ground surface the most important
part of plant, the thick tap root forming some kind of “root crop” grows. At
the largest plants of this species it may reach length one and half meters
at thickness more than half meter and weight about 100 kg. It is covered with
thin elastic bark, and from it some lateral roots grow asides. Here there is
a stock of water carefully gathered by plant during rare rains. At this time
on ground surface numerous soaking roots grow, absorbing rainwater and dew.
In drought they wither, but the plant does not endure lack of water: its main
root grow deep into ground down to 20 - 30 meters and more, reaching water-bearing
layers. Even if the animal like an insect or a rodent will manage to burrow
to the “root crop”, it will have not enough benefit from it: sap of plant contains
a plenty of latex, and thickens on air. At top of “root crop” there is sanctuary
of plant – its apex. If it appears damaged, the plant stops growth, but the
next year in the beginning of rain season it will develop two, or even three
apexes developing from sleeping buds.
In the beginning of rain season wrinkled “root crop” gradually absorbs water,
and the plant slightly “rises”, growing up from under the ground a crown of
young leaves. And in dry season roots retract and involve “root crop” deeply
in ground, leaving on surfaces only dying off leaves.
In short rain season giant desert daisy begins to blossom. Peduncles of these
species are short, and yellow inflorescences (heads typical for all family)
almost lay on the ground in middle of crown formed by leaves: so the plant
is less appreciable from afar for herbivorous
mammals. But it involves to itself
not numerous pollinators (mainly beetles and flies) with a specific smell:
a mix of pleasant flower and putrefactive aromas. Flowering lasts not for long:
no more than one week. After pollination seeds quickly ripen, and the peduncle
starts to grow. It bears ripening seeds on meter tall above ground. Seeds of
giant desert daisy are similar to seeds of dandelion: they are small, have
thick environment and characteristic pappus as they are carried by wind. After
fructification the plant keeps leaves not for long, and by the end of summer
at it the dormant period comes: the elevated part dies off, and the plant spends
in rest an autumn, winter and the beginning of spring, remaining green less
than half-year.
This species develops for a long time: the plant begins to blossom for the
first time only at five years' age when its “root crop” reaches weight of 10
- 15 kg.
Giant desert daisy easily distributes by seeds, therefore it frequently grows
in foothills on island “oases” of the Mediterranean swamps. But here large
local herbivores, Antheos tortoises, can eat it, causing the big damage to
slowly growing plant.
Silver
oromatrica (Oromatrica argenteofolia)
Order: Asterales
Family: Asteraceae
Habitat: Himalayas, alpine meadows at southern slopes.
In Neocene Himalayas still keep a title of highest mountains of Earth.
Here, at huge height, still the most part of year the cold and snow reign,
though in lower valleys and on southern slopes it happens very hot in summer.
Vegetation of Himalayas is variable, though severe conditions of life have
made many plants very similar to each other. Sometimes, it is difficult to
distinguish poppy from carnation or bluebell while plants will blossom – their
leaves and stalks are so similar. The majority of grasses of Himalayas has
creeping or strongly short branchy stalks, and leaves forming rich polsters
between stones. Such form of growth protects them from cold winter winds: snow
quickly closes these undersized plants, and they successfully winter, despite
of winter colds.
But among mountain flora there are not only undersized species pressing closely
to the ground. Here and there on slopes inaccessible to herbivorous animals,
the unusual plant, oromatrica (literally “mountain camomile”) grows. It strongly
differs by shape from the majority of Himalayan grasses. At this plant there
is thick upright trunk about half meter tall, covered with dry rests of leaves.
At top of trunk live leaves grow – they are strongly dissected, having silvery
downiness on the bottom part. It is main protection of plant against colds:
to winter leaves turn upwards, closing apex and protecting it from frost. Covered
by snow, this plant is practically indistinguishable from stones. Leaves have
unpleasant smell and bitter taste protecting them from different herbivores.
But, despite of it, large herbivorous animals nevertheless eat these plants
- in winter even such forage is better, than starvation is.
In spring when snow thaws, growth of oromatrica begins. Live leaves on top
of plant open, and between them young leaves grow. Silvery hairs covering leaves
protect them from superfluous sunlight and reflect pernicious ultraviolet rays.
In stalks there is a stock of nutrients, therefore this plant can recover even
after all its top part was eaten by animals or has been broken by snow avalanche.
Then on the rest of stalk lateral sprouts grow, and the plant forms sprawling
bush. Young leaves can endure rather strong night frosts – spring comes in
high mountains not at once, and sometimes winter may return for some days,
and even weeks. But sooner or later the rests of snow thaw, and there comes
warm weather. The plant actively forms new sprouts and restores roots. The
root system of oromatrica is basically superficial and also forms the ramified
circuit covering large stones: it helps to gather dew which is flowing down
on them in the morning. Landslides and avalanches frequently damage roots of
oromatrica, but they are quickly restored - slow growth in mountains obviously
does not promote survival.
When warm weather is finally established, and danger of night light frosts
leaves, oromatrica begins blossoming. Inflorescences of this plant are similar
to camomiles with short white petals (more precisely – edge semiflosculous
flowers in inflorescences). They tower above a plant on long ramified peduncle.
Flowers smell pleasantly, involving various insects: this plant is undemanding
to pollinators. After the pollination on inflorescence small seeds with fluffy
pappus ripen. When they will completely ripen, their pappuses extend and open.
The first rush carries seeds, but only few of them will get in conditions favorable
for growth. Having fallen on the ground, seeds do not sprout at once: winter
should pass before they will go to growth, and some seeds sprout only after
two winters at all.
Within the first summer of life the young plant forms the crown of leaves on
short stalk, and starts blossoming only since the second year. Life expectancy
of this plant is about 13 – 16 years.
At highest mountains the closely related species grows:
Cabbage
oromatrica (Oromatrica pseudobrassica) – it is more undersized plant:
it forms “cabbage head” of leaves on short stalk. In severe conditions when
even in heat of summer the temperature does not increase above +15°Ñ, and light
frosts at night are possible, this plant manages to grow and blossom. The apex
of this plant is constantly closed by fluffy young leaves, and light frosts
do not harm to it. Peduncles of this plant are short, and petals are covered
with thin layer of wax and reflect ultra-violet light, involving rare insects
of high mountains.
Leafless sea aster (Aphyllaster littoralis)
Order: Asterales (Asterales)
Family: Asteraceae (Asteraceae)
Habitat: littoral zone from Northwest Europe up to North Africa, Iceland, New
Azora.
In Neocene the shore line of Northern Europe had undergone significant changes.
When weight of thousand cubic kilometers of glaciers holding down the significant
areas of continent, had disappeared, the north of Euroasian lithospheric plate
began to rise. The sea receded in significant territories, and the former sea-bottom
turned to plains on which there were the saline lakes drying up later. The
territory, occupied by Northern Sea in human epoch, had turned to extensive
marshy plains with the separate heights overgrown with forest. Baltic Sea had
turned to extensive brackish Venedian Lake isolated from Atlantic Ocean basin.
Cold current Anti-Gulf Stream determines the climate of these places: cool
foggy summer similar to late spring, smoothly passing to early autumn. In summer
in the mornings there are thick mists leaving plentiful dew on leaves of coastal
plants.
The coast of Northern Europe to the south of Scandinavia represents wide strip
of saline marshlands, where action of inflow is strongly felt. Ground and water
are saline here, and sea representatives of fauna meet in shallow reservoirs
at the great distance from ocean. Flowering plants actively develop this area,
forming set of endemic species adapted to existence in conditions of ground
salinity.
At small distance from ocean in littoral zone there is the interesting plant
maintaining twice per day the pressure of tidal waves – leafless sea aster.
This is low plant with thick edged branches divided to segments. Edges are
extended in flat wide “wings” with spikes on edge, and serve for photosynthesis.
The true leaves of plant are reduced up to filmy covers protecting young sprouts.
When sprout starts to develop, cover leaves quickly dry up and fall down. Such
development of leaves is the necessity: during the inflow there is a threat
of damage of plant, therefore leafless sea aster has lost soft and delicate
leaves, having turned in rigid plant similar to coral.
On young sprout edges are small – the probability of the damaging of young
sprouts by tidal wave is less so. Till the process of development of mechanical
tissues they expand and strengthened. Leafless sea aster lives in conditions
of surplus of salt, therefore along edges of stalk glands secreting brine as
rich drops are located. In outflow brine dries up on the sun as white flakes
on edges, and then is washed off by inflow.
For additional protection against salt sea water the surface of plant is covered
with thin wax film especially strongly advanced on young sprouts. Because of
it they have strongly expressed glaucescent shade. The sense of this adaptation
is, that at outflow water does not stay on the plant and does not form the
crust of salt, complicating photosynthesis, on it.
In spring, when it becomes warm enough, leafless sea aster begins to blossom.
Inflorescences of this plant look beautiful – they are white with pinkish middle,
a little bit similar by the shape to chamomile flower with “fluffy” middle
and wide petals; their diameter is about 4 – 6 cm. Semiflosculous flowers are
located in one line at the edge of inflorescence. Medial flowers are supplied
with long pinkish outgrowths of perianth. Inflorescences form on very high
strong stems growing above the level of highest inflow. On one plant it may
be over 20 inflorescences blossoming simultaneously. This plant blossoms after
cool wintering: during the period of relative rest in axils of last year's
stalks flower buds are formed. This feature limits the ability of leafless
sea aster to breeding by seeds – the plant exists normally only in conditions
of expressed seasonal changes of climate. This plant is pollinated by various
insects – more often by beetles and bees, but occasionally on its inflorescences
butterflies feed. Flowering lasts till more than two months. At this time places
of growth of leafless sea aster look very beautifully: flowers bring bright
accent in dim green-and-brown palette of interdial zone.
Seeds with fluffy crest ripen at the end of summer. When they develop completely,
the base of inflorescence is curved outside, and they are carried by wind.
Due to this feature the plant is widely settled along the coast of Europe,
having reached even the coast of Iceland. At New Azora and African coast this
plant blossoms seldom – only after especially cool winter, when flower buds
form.
Except for seeds, leafless sea aster is settled with the help of sprouts. Tidal
waves frequently break off branches of this plant and carry them away in ocean.
Parts of plant are able to survive for a long time, floating in sea water.
Due to such ability this plant was settled even further to the south, but southern
populations of this species do not blossom.
“Flora’s fan” (Flabellisenecio monstrosus)
Order: Asterales (Asterales)
Family: Asteraceae (Asteraceae)
Habitat: South Africa, hillsides.
At plants of various botanical families and orders one interesting feature
of growth is known – it is the producing of cristate forms. In this case the
apex turns to a line of growth, and the stalk of plant instead of the cylindrical
or ridge form becomes flat and crest-like, or has twisting edges. Such forms
were frequently observed in human epoch at plants of cacti family: among them
a lot of species of various genera formed such forms. Less often the producing
of cristate form was observed at plants of other families: at succulent spurges
(Euphorbiaceae), crassulas (Crassulaceae) and Celosia (Amaranthaceae). Usually
cristate forms of plants could exist for a long time only in conditions made
by people, and in nature they did not maintain a competition to usual form
of the same species. But in droughty deserts of South Africa a rare case had
taken place, when this kind of deformity has turned to an attribute favourable
to survival.
Among the rocks heated by the midday sun, strongly keeping by roots for poor
ground, one of the freakish plants of Neocene, “Flora’s fan” grows. It is stem
succulent, which has got water-stocking stalk due to formation of the cristate
form. “Flora’s fan” has two types of sprouts – cristate and typical ones. Perennial
caudex of this species has cristate form and represents fan-shaped structure
(hence the name of this plant) about one meter high. As it grows, it becomes
thicker, the bottom part covers by suberificate bark, and from the basis to
edges of caudex sharpen edges stretch. Edges of caudex, where the growth zone
is located, are slightly wavy. The edge of fan-shaped caudex has green border:
the growth of last two years keeps a function of photosynthesis. But older
parts of caudex become covered by dense skin, turning later to dense grey-brown
peel. “Flora’s fan” is original “compass plant” of deserts of the south of
Africa: fan-shaped caudex grows by the north – south line in order to avoid
hot beams of midday sun (in southern hemisphere in midday it stays at the north).
In the basis of caudex additional buds form, and from them young stalks of
fanlike shape develop.
On edge of fan-shaped caudex the short normal sprouts grow. They have thick
cylindrical pentahedral stalks – possible, the ancestral form of this plant
initially had similar stalks. On sprouts of usual type prickles develop in
the beginning, and then narrow leathery leaves with small prickles on edge.
These sprouts are short and do not branch. Having reached the length of about
20 cm, they stop growth, and on them small inflorescences develop – heads of
yellow color gathered to common corymb-like inflorescence at the tip of stalk.
For protection against herbivores the surface of caudexes and stalks is covered
with small prickles. Also prickles develop on edges of caudex and annual sprouts.
Prickles on caudex are the modified leaves had kept only thick central nerve,
and on sprouts of usual type prickles are formed by lignificate outgrowths
of edges.
After deflowering leaflets of inflorescence covers supplied with tiny prickles,
protect developing seeds. In dry season when seeds with fluffy cops ripen,
the cover opens, unbends, releasing seeds, and dries up. Seeds of “Flora’s
fan” are carried with the help of wind. Soon after seed ripening sprouts of
usual type die off. After them at the edge of caudex the lines of stamps of
characteristic appearance stay; they are especially large at plants of the
age of 8 – 15 years. By their quantity it is possible to count the age of plant
which begins to blossom for the first time at the fourth year of life. During
the drought on caudex wrinkles appear, and the last year’s growth dries up
a little. At the beginning of new rain season the caudex quickly restores stocks
of water. On its edge the growth of new tissue begins, and then the next line
of new sprouts is formed.
Life expectancy of this plant seldom exceeds 30 years.
Monocotyledon
plants
|
Hamster's wheat (Syntriticum dimorphosperma)
Order: Cyperales (Cyperales)
Family: Graminoids (Poaceae)
Habitat: steppes of Three-Rivers-Land, Middle and Central Asia.
In the nature very often there were unions of plants and animals, in which
animals played a role of “owners” of plants, creating by the activity favorable
conditions for plants development. Such unions arose in parallel in different
areas of Earth at species of different systematic groups. For example, within
human memory different insects, ants and termites, cultivated microscopic fungi
on rotting vegetative material. Millions years of co-evolution had resulted
in occurrence of separate species of fungi normally developing only in symbiosis
with insects.
In Eurasia of Neocene epoch the situation had repeated: in steppes the new
symbiosis of plant and animal had appeared. The background of this symbiosis
is extremely remarkable: it originates in human epoch. Human agricultural activity
had generated the special forms of graminoids, wheat and rye, with large seeds
ideally adapted to settling with the human help. Cultural cereals appeared
so changed by artificial selection that the majority of their forms appeared
unable to exist without people and had died out. But some forms of cultural
wheat had survived in steppes of Eurasia due to activity of animals against
which people waged ruthless war till thousand years – rodents. When the people
had disappeared, rodents began to carry seeds of graminoids cultivated before
by people. Running wild graminoids lost the attributes acquired till thousand
years of selection and adapted to new seed carriers. This way in Eurasian steppes
new species of these plants had appeared.
The separate species of graminoids was generated in conditions of symbiosis
with farmer hamster, one of steppe rodents. This animal had passed from simple
gathering of seeds of wild graminoids to true cultivating of fodder plants
at its territory. One species of graminoids grows especially good in conditions
of similar care and has adapted to coexistence with farmer hamster. Its possible
ancestor is feral wheat (Triticum) widely cultivated by people, and its descendant
is named hamster's wheat. Main feature of hamster's wheat permitting it to
receive advantages from the union with gluttonous rodent is features of seeds.
At hamster's wheat there is the special structure of flowers: they grow together
in clusters of three ones, and the ear of this plant is made of such “triplets”.
The middle flower in “triplet” is not pollinated, but from it large parthenocarpic
seed with normally advanced embryo is formed. It is rather large and also is
able to sprout in favorable conditions. From sides two another flowers forming
seeds only at pollination grow to the middle flower. For this feature the plant
had received the genus name “Syntriticum” – “joint wheat”. At lateral flowers
of hamster's wheat seeds are small and covered with dense environment. They
have the concave shape and surround the middle parthenocarpic seed like a peel.
Their covers are firm, and it is difficult to gnaw them; the rodent, as a rule,
disregards these seeds, clearing from them and cracking only larger middle
seed. Seeds of the second type thrown out in common with dust sprout the next
year.
At northern and western borders of area this plant is annual – the underground
part of plant does not maintain a frost in conditions of continental climate.
Only under thick layer of snow the part of roots hibernates more or less successfully.
At the coast of Fourseas and in western part of Three-Rivers-Land steppes climate
is rather warm, and the plant becomes perennial – it grows at the same place
till three years in succession and even longer at the extreme south of area.
The shape of hamster's wheat is typical for graminoids: at it there are high,
up to one meter, strong culm stalks and long narrow leaves. Hamster's wheat
gives new buds in the basis of stalk and forms friable bushes. One sprout forms
till the growth season a bush on which it is formed about ten ears weighting
20 grams each other to an autumn.
In mixed herbages competitiveness of this species is too low. The plant survives
much more successfully in the union with farmer hamster. This animal raises
chances of hamster's wheat to survival, carries its seeds and looks after “allotments”
cutting plants competing to this species.
First weeks of life the plant develops rather slowly – at this stage of development
other grasses, especially wide-leaved ones not belong to graminoids easily
muffle it. Hamster's wheat expands, giving from the basis of main stalk lateral
sprouts. To the beginning of summer all sprouts start to grow quickly and the
plant overtakes former competitors. The plant quickly reaches one meter height
and forms ears with long stigmas and plentiful dry pollen. Pollen of hamster's
wheat falls from anthers approximately in midday time during one hour. In same
time stigmas of pestles are susceptible to pollen. The plant is self-sterile
and is only cross-pollinated. The wind carries its pollen: it is the common
feature of all graminoids. Seeds ripen to the middle of an autumn. In southern
areas where the vegetative season is long, flowering and fructification pass
by two waves – the plant flowers second time on lateral sprouts approximately
one month after the basic flowering. Thus seeds also ripen in two portions.
Gorgeous urushiphila (Urushiphila spectabilis)
Order: Orchids (Orchidales)
Family: Orchids (Orchidaceae)
Habitat: forests of Japan.
Orchids are most variative family of flowering plants in Holocene epoch. They
had reached the success in struggle for existence with the help of two important
adaptations. First of them is high specialization to entomophily. Each species
of orchids is pollinated by few species of insects, and sometimes only by one
of them. The plant develops the special adaptations in structure of flower,
excluding the feeding of “strangers”, casual species of insects, on flowers.
The second component of their success is the close symbiosis with fungi. Due
to it orchids had solved two problems. They can survive on poor substrata due
to the ability of fungi to transform mineral substances to easily consuming
by plant form. It has permitted to orchids to succeed in ecological niche of
epiphyte. And the second problem, tiny seeds assisting to epiphyte to settle,
also was solved with the help of fungi. Penetrating to seed of orchid, fungus
delivers to microscopic germ nutrients, providing its development at early
stages.
Symbiosis has permitted to some species of orchids of Holocene epoch to pass
to other way of life, rather than the majority of plants – to become saprophytes
having lost chlorophyll and leaves. Such orchids live, eating substances delivered
to them by fungi. And some orchids of Neocene epoch had replaced the character
of relations with surrounding species of plants and fungi, having turned to
specialized parasites. One species of parasitic orchids grows in Neocene in
Japan Islands. It grows attaching to roots of amazing local plant – “death
tree”, one of the most poisonous plants of the world. The orchid is named urushiphila:
“urushi” is the Japanese name of poisonous sumach.
The union of the parasitic plant and the poisonous host plant had taken place
in Holocene. One species of sandal tree (Santalum) parasitized at the poisonous
upas tree (Antiaris), and the poison of the host plant had penetrated into
it up to leaves. Urushiphila is also literally impregnated with poison of “death
tree”, using it for protection against pest insects. Only its flowers are lack
of poison.
Urushiphila represents a plant lack of chlorophyll and deeply specialized to
parasitic habit of life. Leaves of this orchid are reduced up to small scales
surrounding the basis of peduncle. Stalk of urushiphila is long ramified rhizome
growing in ground at the depth about 20 cm. It reaches length of several meters
and forms numerous knotty inflows. On them flower buds from which flowers are
serially formed develop.
Besides of “death tree” urushiphila adheres to roots of some sumach species.
Flowers of urushiphila large and single, reaching the diameter of about 5 cm.
at the peduncle it may be two flowers occasionally – at the ancestor of urushiphila
the inflorescence represented a rich truss. Flowers rise from ground to the
height of about 30 – 40 cm and have strong pleasant aroma. Their petals are
white and pointed; labium is cup-like and pinkish. Due to white colouring flowers
of urushiphila are well appreciable in twilight of underbrush. At the labium
of the plant the long spur directed downwards is formed; honeycups are located
in its deep. It makes the pollination of urushiphila the privilege of insects
with long proboscises. This plant is pollinated by butterflies, and on its
flowers the urushi swallowtail, the large species of local butterflies, feeds
often. It is the basic pollinator of urushiphila.
Urushiphila exists literally “at the verge of nonexistence”, balancing between
life and death. On the one hand, microscopic soil fungi are necessary for germination
of its seeds, but on the other hand secretions of leaves of the host plant
kill the mycelium. The plant had solved this problem rather simply: it patiently
waits while the host plant will find it itself.
Seeds of urushiphila have the microscopic size: it is the common feature of
all orchids. They sprout with the help of mycelium which penetrates into seeds.
First years of life the orchid exists as saprophyte, accumulating forces for
“attack” to the host tree. It grows rather slowly and does not blossom, representing
a shapeless underground tuber with thin skin. The situation changes when the
sprout of host plant appears near it. When young “death tree” starts to develop,
under influence of substances emitting by it the mycelium starts to degrade.
It is one of signals for the tuber of urushiphila modifying the physiology
of the plant: at orchid the feeding root grows actively searching for roots
of host tree under the ground. The orchid feels root secretions of the host
plant and directs feeding root to its side. For the formation of this root
stocks of nutrients had been accumulated till many years of underground existence
are expended. The orchid even starts to “digest” actively hyphae of the fungus
permitted it to sprout. Urushiphila “inserts” to the development of root all
nutrients. If it could not reach the host plant, the tuber starts to degrade
and the plant perishes. Many tubers of this plant may be eaten by various underground
animals or perish when the necessary plant had not appeared near the tuber.
But at successful coincidence of circumstances the plant wins “main prize”
in struggle for existence – after the attachment to tree the orchids start
to develop much more actively. It quickly increases the weight of rhizome and
actively generates flower buds. From germination of seed to the first flowering
sometimes about 15 years pass. Expanding, the rhizome of urushiphila can adhere
to near trees of the host plant species.
Urushiphila meets in woods of Japan Islands seldom enough. But in places favorable
for life it forms mass congestions – among trees tens flowers of this plant
rise.
Protected myrmiorchis, ant orchid (Myrmiorchis tutus)
Order: Orchids (Orchidales)
Family: Orchids (Orchidaceae)
Habitat: rainforest of South America; epiphytic plant.
In human epoch many species of plants entered symbiosis with ants were known.
Plants formed in the body special cavities in which ants settled, and in exchange
not only used excretions and waste products of ants, taking nutrients from
them, but also received reliable protection. Among “green friends” of ants
there were acacias, some other trees, and also numerous epiphytes. Among numerous
species of orchids plants of genera Schomburgkia, Coryanthes and Gongora had
hollow stalks served as a refuge of ants. In Neocene independently of them
similar relations with these bellicose insects one more orchid had formed –
myrmiorchis, the epiphytic plant of South American rainforests.
This plant has sprouts of two types. Dense oval leaves of orchid grow on short
vertical sprouts. The main mass of plant is made of thick creeping rhizome,
which creeps along a branch on which the orchid has settled. The rhizome is
especially unusual, because on it zones of secondary growth develop. This phenomenon
extremely seldom meets not only at orchids, but also at monocotyledon plants,
to which orchids belong, in general.
Young apical part of rhizome is smooth. It partly rises above substratum and
is covered with leaves. When leaves fall down, from buds secondary sprouts
start to develop. The old part of rhizome begins changing: occurrence of zones
of secondary growth has casual character, and the rhizome gets irregular shape.
It becomes knobby, in it apertures and cavities, and also additional apexes
form. Old rhizome reaches length of about one meter and half-meter width.
Ants of various species protecting orchid against pests live in cavities of
myrmiorchis rhizome. Besides dung and rests of prey of ants are sources of
organic substances necessary for growth of this epiphytic plant.
But the union of orchid and ants has the back side. Ants perfectly protect
orchid from various herbivorous insects damaging leaves and rhizome of plant.
But they equally successfully can attack pollinator insects, vital for this
orchid. Therefore myrmiorchis had developed the adaptation allowing to pollinating
insects to visit its flowers, not risking getting to ant’s mandibles. The plant
simply interferes with access of ants to flower-bearing stems. At the medium
part of each flower-bearing stem, lower than the lowermost flower is located,
there is original “cuff” some centimeters long consisting of long rigid bristles
of different length. Ant may hardly overcome it, and these insects seldom appear
on flowers of myrmiorchis.
Flowers of myrmiorchis are adapted to pollination by butterflies. The inflorescence
of this plant represents lax truss of 15 – 20 flowers on high (about 60 cm
long) vertical flower-bearing stem. Flower of myrmiorchis has rounded petals,
and also is small and white. It has small labium passing to long spur turned
down and forward. In labium there are some thin stripes of purple hairs, indicating
to pollinator insect the way to nectar. Some dots of the same color may be
in the basis of petals.
Myrmiorchis develops quickly enough – this plant begins to blossom already
at the fifth year of life. This orchid differs in fast growth, forming a bush
up to three kgs in weight to the moment of flowering.
Bromelia-leaved
ladies'-slipper (Coronopedium bromeliaephyllum)
Order: Orchidales
Family: Orchidaceae
Habitat: islands of Indian Ocean.
Orchid family is the biggest and rich in species one among all flowering plants.
Its representatives are grass plants have mastered various places of inhabiting.
Among them there are most of all epiphytes, but there are ground species, and
also orchids living in marshes, and even aquatic plants are known. In Australia
in human epoch some species of orchids constantly growing, and even blossoming
under ground were known. One of features, which have provided success of orchids
in struggle for existence, is their symbiosis with fungi. Some orchids have
developed it excessively: they have lost chlorophyll, and live only due to
organic substances of ground which acquire with the help of fungi.
Seeds of orchids are very tiny, looking similar to dust. They sprout and develop
only then when the mycelium of the certain species of fungus will sprout in
them.
The significant part of orchids lives in tropics, but in temperate climate
they also are rather various. These plants may be met both in damp tropical
woods, and in rather dry savannas. In Neocene epoch some representatives of
orchids due to tiny seeds carrying by winds have got from Indonesia to islands
of Indian Ocean and have occupied their ecological niche in island woods.
Orchid living on these islands, is rather original even then, when it does
not bloom. It is an epiphyte: strangely enough, on trees it is easier to find
water necessary for life, than on the ground: subsoil waters on islands are
salt because of affinity of ocean. Therefore rain is a unique reliable source
of fresh water on islands. But rain water needs to be gathered and kept, and
orchid from islands successfully makes it. At it there is short stalk, and
curved leaves form the dense crown. During rains water gathers in crown, forming
special mini-pools. The same feature is characteristic for South-American plants
of bromeliad family (Bromeliaceae), therefore because of this analogy the orchid
has received the name bromeliad-leaved ladies'-slipper. Leaves of this ladies'-slipper
are covered with spots merging to cross strips – it also amplifies similarity
to bromeliads. For bromeliads such similar striped figure is also characteristic.
Diameter of such crown reaches half meter, and depth is up to 20 cm. In one
crown of adult plant about two litres of rain water may gather. In this water
larvae of mosquitoes and midges frequently find a shelter, and also larger
animals may settle: snails and ground cancers which even hatch posterity, sitting
in these plants.
To save water, at this orchid other adaptation was also developed: leaves are
covered with thin layer of wax. It prevents, on the one hand, superfluous evaporation
of water, and on the other hand - leaves are not moistened with water, and
there is no danger of their rotting. Due to wax coating this plant can normally
grow in dry air.
Peduncles of bromeliad-leaved ladies'-slipper are not protected by wax film,
but it is not necessary for them: the peduncle sprouts at the basis of the
old crown. In the beginning from under the crown thick stolon sprouts – it
is the sprout with reduced leaves. Some time it grows aside, and then bends
upwards and forms peduncle carrying one large flower.
The flower at bromeliad-leaved ladies'-slipper is pollinated by beetles. For
these insects the plant prepares the special “entertainment” in the bottom
petal (at orchids it is named “lip”) curved like bag. It is the fragrant sweetish
liquid formed from nectar plentifully flowing down in petal, diluted with rain
water. Trying to get it, insects fall in petal, and then start to search for
an exit. Edges of lip are bent inside, forming “visor” above puddle of nectar,
and it is possible to leave from this petal, only crawling near stigma and
having received after that a lump of sticky pollen. Having sated and having
taken “sweet bathing” in nectar, the beetle leaves flower and flies … to the
following one, where all events repeat. The plant involves insects with contrast
colouring of flower: on vine-red background of petals white spots reflecting
ultra-violet light are scattered. The top petal (“sail”) is entirely red, but
its edge is bordered by white strip. The lip is red - brown, but for insects
there are special “signs” – edges of lip are covered with thin white strokes.
The adult plant forms up to 3 - 5 flowers at one crown. The flower keeps on
peduncle rather long time: about 2 months, but not always on its place the
fruit – narrow pod with microscopic seeds – is fastened.
After flowering on sarment in place of peduncle forming the new crown grows.
But frequently sarments simply dry up after flowering.
The plant actively breeds by offsprings, but extremely slowly renews from seeds.
The first year sprout exists due to grown in it mycelium and represents a tiny
lump of cells. Only for the second year of life the sprout gives the first
leaf, and begins blossoming only at eight-year age, and even later. But with
the help of seeds the plant was settled at the most distant islands of Indian
Ocean.
Mole flower (Talpanthus subterraneus)
Order: Arales (Arales)
Family: Arums (Araceae)
Habitat: forest areas of Europe.
Deciduous forests in areas of temperate and subtropical climate are a place
where change of seasons causes significant distinctions in conditions of inhabiting
of plants and animals. In summer tree leaves almost completely trap sunlight,
and underbrush is very shady – only shade-enduring plants can grow there. An
autumn the significant part of foliage falls down, and within approximately
half-year light exposure of underbrush becomes much better. But winter colds
interfere with growth of grassy plants, and therefore time of active vegetation
of photophilous grasses lasts till some spring weeks. Representatives of this
ecological group of plants are known as ephemers (annuals) and ephemeroids
(perennial plants).
In spring there are few flowers in forest, and after wintering insects search
for them actively. Any flower had appeared in the beginning of spring will
be necessarily visited by insects. But frosts, which may kill flowers, prevent
to plants to blossom too early. Nevertheless, one of plants of European forests
has adapted to blossom early in spring.
When snow thaws and the top layer of ground gets warm a little, under the ground
thick knobby rhizome awakes. From the last autumn on it large flower buds developed,
and they waited for spring warming. When the ground gets warm enough, flower
buds sprout. Their cover representing a modified leaf (spatha) punches a layer
of ground and last year’s foliage, and grows on height of about 30 centimeters.
Spatha is densely curtailed in tube which has yellowish-white color from outside.
At top spatha opens, and its inner side – meaty-red with grayish spots – becomes
visible. Spots are covered with hairs reflecting ultra-violet light, therefore,
insects, not distinguishing red color at all, notice inner side of spatha,
and move right to it. When spatha opens, the putrefactive smell is emitted
in air, and beetles – the basic pollinators of this plant – willingly gather
to it.
The most interesting feature of this plant is the position of its flowers below
the ground level – hence this plant has got the name “mole flower”. Tiny and
homely flowers of this species are gathered in spadix inflorescence, which
has no flower-bearing stem and develops directly on rhizome. The spatha forms
a tube through which insects reach the underground inflorescence, and hairs
directed downwards keep insects near the inflorescence while pistillate flowers
will lose a susceptibility to pollen. After fertilization the top part of spatha
dies off, and the bottom part serves as protection of developing infructescence.
The infructescence of mole flower ripens an autumn. It represents strongly
grown up spadix with sweetish amylaceous pulp, in which seeds are immersed.
The bottom part of spadix starts to grow actively, and the infructescence becomes
taken out to the ground surface, where it is eaten by birds and mammals – seed
carriers of mole flower.
In middle of spring, when flowering is finished, the mole flower takes out
to the ground surface the large bud, in which some leaves curtailed together
are contained. The leaf of mole flower has rounded outlines; it is large (its
diameter is about 40 – 50 cm), deeply dissected to three, five or seven lobes.
At young plants did not blossom yet, leaves are integral or triple, and at
mature ones with good advanced rhizome they reach complete development. The
surface of mole flower leaf is smooth and dark green with lighter nerves. Leaves
die off in first half of summer. During the vegetation this plant has time
to stock enough nutrients for formation of new flower buds and for ripening
of infructescence.
The young plant of mole flower begins to blossom for the first time at the
third year of life, and in northern parts of an area at the fourth, and even
at the fifth year of life.
At the north of Europe and in the Alpes the close species of plants lives –
serotinous
mole flower (Talpanthus tardus). At this species flowering and
fructification are separated by winter colds, and vegetation lasts during the
whole summer. Feature of this species is the blossoming of serotinous mole
flower at the beginning of an autumn. In winter this plant stays in rest condition,
and the last year’s infructescence appears from under the ground in late spring.
This species has large leaves of dark green color, only slightly cut on edges.
“River daisy” (Spongiolemna gigantissima)
Order: Arales (Arales)
Family: Duckweeds (Lemnaceae)
Habitat: subtropical and tropical areas of Far East and East Asia, Japan Islands.
Duckweeds are the most specialized and most strongly changed family of flowering
plants. Their body has turned to frond – the original alloy of leaf and stalk.
Some duckweed species may lack of roots. Flowers of duckweeds are reduced up
to pestles and stamens covered with thin wrapper.
Despite of such deep degeneration of body, duckweeds are prospering group of
plants. Due to high growth rate and ease of vegetative breeding duckweeds form
continuous cover at the surface of reservoirs, and also are the important food
resource for water animals.
In Holocene duckweeds were submitted by tiny plants, and to this family the
smallest plant of the Earth belonged – Wolfiella of only about 0.5 mm long.
In Neocene family is also submitted mainly by tiny plants poorly changed in
comparison with human epoch. But among them some specialized forms had evolved,
including one original giant. It is “river daisy”, the aquatic plant floating
on a surface of the rivers and lakes of East Asia. At first sight “river daisy”
can be confused with other plants – floating leaves of water lilies. But at
close examination the difference becomes obvious. Rounded fronds of this species
remotely similar to leaves of water lilies have diameter about 15 – 20 cm.
Their edges are slightly cut up and wavy, blades are inflexed a little, and
frond of plant resembles the stylized image of flower. Body of plant in the
bottom part is spongy and has advanced aerenchyma. Because of numerous air
bubbles it has silvery colouring. The top side of frond is dense and leathery,
and has bright green color. One adult plant is able to grow on its edges some
new fronds simultaneously. Buds, from which they form, develop on edges of
frond blades. At the bright sunlight young fronds redden. At northern edge
of an area in autumn the plant produces small turions similar to fronds of
common duckweed species. They float at the surface of water and gather at the
coast. In winter adult plants die off, and turions immerse to the bottom where
winter successfully. Spring warming and amplification of light exposure stimulates
their development.
Growth rate of this plant is very great. The development of one frond from
occurrence up to reaching of full size takes about one week, and on one adult
frond simultaneously up to seven fronds of new generation may develop. On the
bottom side of frond “beard” of thin not branching roots reaching length of
10 cm grows. They actively absorb organic substances dissolved of water due
to what this plant effectively clears water.
This plant is dioecious. Male plants differ in smaller size, but breed vegetative
more intensively, and the biomass of male and female individuals in population
is approximately identical. Flowers of “river daisy” are reduced, as at all
duckweeds, but differ in special structure. Pestles and stamens at them are
very long and strong; they are covered at the basis with small spatha leaflet,
which dries up soon. Flowers develop between blades of frond. “River daisy”
is an entomophilous plant, but its relations with insects are considerably
simpler, than at orchids, for example. Damselflies like to sit on pestles and
stamens sticking up above thickets of “river daisy” for rest. They carry sticky
pollen of this plant on legs. Seeds of “river daisy” are tiny, covered with
sticky slime. They float on water surface for a long time, and stick to feathers
or wool of water tetrapods, which settle this plant.
The idea about the opportunity of evolving of such plants is proposed by Nem, the forum member.
Sporiferous
plants
|
Two-shaped tongue fern (Epiphyllitis heteromorphus)
Order: Cyatheales (Cyatheales)
Family: Aspleniaceae (Aspleniaceae)
Habitat: warm and humid forests along the western and southern coasts of Fourseas.
Climate warming has resulted in formation at the south of Europe of deciduous
forests having separate features characteristic for tropical forest. But the
area of these forests is very limited – the Mediterranean clutched between
Europe and Africa had turned to salt desert, and the water comes to these forests
only from Fourseas – huge brackish sea-like lake at the southeast of Europe.
Warm- and moistureloving forests cover its southern and western coasts. The
plants making these forests are descendants of local European plants – mountains
and Mediterranean lowlands reliably isolated them from “true” tropical forests.
Besides the features of the trees forming these forests, the presence of epiphytes,
characteristic life forms, gives them tropical appearance. In European forests
of tropical type mosses and ferns are epiphytes.
One of epiphytic ferns of these places is two-shaped tongue fern, the descendant
of common European hart’s tongue fern (Phyllitis scolopendrium) of Holocene
epoch. This species grows in forks of branches, where the needed amount of
vegetative material for germination of its spores accumulates.
Similarly to the ancestor, this species is crown plant forming dense funnel
of fronds. At this species two types of fronds develop – sterile and fertile
(hence the specific epithet). Sterile bottom fronds are rounded, wide and leathery.
In them vegetative dust, bird dung and other substances accumulate, and the
plant receives nutrients from them. The additional roots developing on short
stalk of plant penetrate there. Being young, sterile fronds take part in photosynthesis
for some time, but as they develop, the amount of chlorophyll in them reduces
and suber tissues develop. These fronds turn rigid, and only at their edges
the area of growing tissue stays. The similar type of fronds develops at staghorn
fern (Platycerium), which has successfully survived up to Neocene epoch and
lives in South-East Asia and Meganesia.
Top fronds of two-shaped tongue fern are softer. They photosynthesize and on
their bottom side along lateral nerves, at an angle to central nerve, sporangiums
gathered to linear soruses develop. This species has lengthened, non-divided
and dense fronds – this feature is inherited by it from the ancestor. Fertile
fronds of this fern have slightly wavy edges and rather soft tissue. At short-term
winter cold snaps they may die off. But up to this time the plant forms in
the center of the crown some young fronds, which do not unwrap in winter and
cover a vulnerable apex. They produce slime rich in polysaccarides, which protects
apical tissues of damage by cold. In spring, when it becomes warm enough, they
open, and new fertile fronds grow very quickly. Completely advanced plant forms
the crown about 50 – 60 cm in diameter.
Two-shaped tongue fern strongly attaches against bark of trees by roots easily
growing into roughnesses of bark and penetrating deeper while its grows thick.
At the old part of rhizome new sprouts grow, and one plant can form thickets
of several large crowns.
This plant breeds by spores easily carrying by wind and by insects. But two-shaped
tongue fern has one more way of breeding. Fertile fronds easily form brooding
buds being damaged. Usually the bud is quickly forming at the place of break
of nerves, and the broken off piece of fertile frond also may produce at least
one bud, from which the young plant successfully develops.
Epiphytic horsetail (Equisetum dendrophilus)
Order: Equisetales (Equisetales)
Family: Horsetails (Equisetaceae)
Habitat: forests of Balkan and South Europe.
The climate of Neocene differs in heat and humidity. It has resulted in expansion
of tropical and subtropical zones and shifting of borders of heat-loving vegetative
communities areas to higher latitudes. In Europe heat-loving forests had appeared
in southern part, in Alps foothills, at the Balkan and in Asia Minor. To the
south, behind the Alps, the hollow is spread being earlier the bottom of Mediterranean
Sea. This is a place where salt swamps and rigorous saline deserts dominate.
To the south of Mediterranean Lowland savannas of North Africa cut by huge
river named Sahara Nile spread. Extensive plains appeared an absolute obstacle
for heat-loving vegetation of Africa, and mountains have prevented penetration
into Europe of Asian heat-loving plants. Therefore subtropical woods of Europe
are formed by descendants of local plants evolved in favorable conditions:
the huge sea-sized lake Fourseas provides these forests with moisture.
In multilevel forests of south-east of Europe the set of opportunities for
evolution had appeared. Huge trees are twined with lianas and on branches epiphytes
live as in true tropical forest. Basically they are various ferns – from tiny
and delicate up to huge ones with skinny leaves. But among their leaves (fronds)
of various shape long and similar to brushes sprouts of other sporous plant,
epiphytic horsetail, the endemic of the south of Europe, are visible.
It is easier to sporiparous plant to occupy a niche of epiphyte, rather than
to flowering one – spores are easily carrying by wind (orchids growing often
as epiphytes have microscopic seeds with reduced germ). But sporous plants
have one vulnerable feature: from the spore not a sprout of adult plant, but
prothallus, the sexual generation develops. On it feminine and masculine genitals,
archegones and antheridiums develop. And drops of water are necessary for fertilization
and development of adult plant (sporophyte). Therefore sporous plants have
reached especial success in woods with high air humidity.
In early Neocene seas of south-east of Europe had returned to their coasts
after drying up ice age, and later had merged to Fourseas. It had favorably
resulted in climate of Balkan – the climate became more humid and rainy. The
ancestor of epiphytic horsetail, obviously, settled in these conditions in
moss cover, and then became climbing plant. Gradually descendants of this species
began to pass a complete cycle of development in tree crones. The Neocenic
epiphytic horsetail had appeared so.
The epiphytic horsetail represents rhizomatous grassy plant. Its rhizomes creep
on trunk upwards and downwards, hiding from sunlght in cracks of bark. Covers
of rhizomes are thick and spongy – it is a reliable protection against excessive
evaporation of water.
Stalks of epiphytic horsetail are thin and low – not higher than 20 cm. But
this plant forms rich cushion thickets of bright green color. As all species
of horsetails, this plant is lack of leaves, but lateral branches located in
nods of stalk by verticils of ten ones and more. The bottom nods of stalks
are located closer to each other and lateral branches are denser here, rather
than on tops of sprouts – this way inside thickets in growth zone of rhizome
and young sprouts the optimum microclimate is kept.
Rhizomes of epiphytic horsetail have two types. The basic rhizome is rather
short, with internodes pulled together. From it vegetative photosynthesizing
sprouts grow. From the basic rhizome keeping the certain distance lateral rhizomes
of the second type grow. These rhizomes are very thin and have long internodes,
reduced roots and vegetative sprouts. They creep on trunk, and sometimes freely
hang down from branches. Wind shakes such rhizome and throws it to the next
tree. There it is fixed, quickly forming roots clinging to the tree bark, and
starts to grow, forming characteristic green “bottle brushes”. This plant is
settled so.
Sporiferous sprouts of this plant strongly differ from vegetative ones – they
are long (reaching one-and-a-half-meter length), without lateral branches,
with narrow and long strobil on the end. Such sprouts develop in the beginning
of summer. The stalk of sporiferous sprout is elastic; therefore sprout is
arcuated and hangs, being shaken in the wind. The plant simply uses one behavioural
feature of flies – these insects like to perch on hanging down thin objects.
Not only wind, but also insects carry spores of epiphytic horsetail. Spores
with outgrowths (elaters) cling to legs of flies and are delivered by insects
to places where the wind could not bring spores. This habit of spores carrying
gives appreciable advantage in settling to the epiphytic horsetail.
In the best way the spores had got in damp places (for example, on the friable
bark of tree holding moisture) develop. From spore small prothallus similar
to hat with cut up edges grows. On its convex middle part the masculine genitals
(antheridiums) are located, and edge lobes female archegones are. Fertilization
is promoted by the form of prothallus: the dew drop gathers on antheridiums,
spermatozoids get in it, and then the drop simply rolls down to archegones.
Sometimes from connected spores some prothalluses growing near each other are
formed. Even the cross fertilization giving more viable plant is possible in
this case.
Young plant at the first years of life forms only sterile sprouts and does
not give long rhizomes with which help it is settled. Approximately at the
fourth year of life at it first sporiferous sprouts are formed and got stronger
plant at the age of about eight years starts to settle with the help of rhizomes.
It forms set of clone thickets stretching to tens meters in forest canopy.
The close species, hanging wood horsetail (Equisetum pendulus) as if keeps
features of the previous stage of development of epiphytic horsetails. This
species
grows on bark and keeps against it by roots sprouting deeper in process of
its thickness increase. Vegetative sprouts of this plant freely hang down,
reaching the length of meter and more. Their lateral branches are thin and
long, therefore this horsetail looks fluffier. Strobils are formed on ends
of sprouts which are not distinguished externally from vegetative ones. Strobil
of hanging horsetail is long, and spores of this species are also carried not
only by wind, but also by flies.
Fungi
|
Predatory water mold (Xenosaprolegnia carnivora)
Order: Saprolegniales (Saprolegniales)
Family: Saprolegniaceae (Saprolegniaceae)
Habitat: freshwater reservoirs of temperate, subtropical and tropical latitudes
of Old and New World, Meganesia.
Among mushrooms there is a big group which representatives live exclusively
in water. These ones are primitive oomycetes fungi which because of their appearance
had received the common name “water mold”. Mycelium of these fungi forms cotton
wool-like white cover on rotten substrata of animal origin. Frequently oomycetes
develop on open wounds of fishes, corroding their tissues up to bones (fungus
Saprolegnia leads such way of life).
One of Neocene species of oomycetes had passed to more effective way of feeding
– it had turned to passive predator. Predatory species usually meet among soil
fungi. They form sticky heads and trapping loops, in which microscopic invertebrates
get. Predatory water mold catches prey exclusively with the help of glue. This
fungus forms special plentifully branching hyphae. Cells forming these hyphae
have elastic walls and can stretch strongly. On tips of such hyphae traps form
– they look as wide sticky heads. Each head represents a drop of glue of gel-like
consistence, “stretched” on brush-like branching terminal cells of hypha.
This oomycete develops exclusively due to live organisms caught by it. Predatory
water mold forms sticky locks about 10 cm long in still places of ponds and
rivers, among vegetation. With the help of sticky heads this fungus catches
tiny organisms like protozoans, rotifers and other worms. When small animal
is pasted to trapping head of fungus, substances from covers of its body diffuse
into slime. Their occurrence serves as stimulus for growth of cells on which
the drop of glue is stretched. If caught animal starts to try to escape, fungus
hyphae do not come unstuck from its body due to the extensibility of cellular
walls. Moreover, returning to initial position, hyphae of fungus draw caught
prey back, and it may casually paste to some other sticky heads. The cells
forming trapping head, reach a surface of prey body in some minutes. They start
to emit the enzymes destroying cell environments of prey, and sprout in its
body similarly to roots, dissolving and absorbing substances of prey body.
In some hours no rests remain from soft-bodied, and from small larvae of crustaceans
and insects only chitinous armours keep. Large colonies of predatory water
mold represent real danger to tadpoles, fry of small fishes and larvae of shrimps.
But this fungus itself serves as food to some water animals – to adult crustaceans
and molluscs. It is eaten also by some fishes and ducks.
Spores of predatory water mold are covered with protective mucous membrane,
and are easily carrying to other reservoirs on legs of waterfowl. It explains
practically global settling of this fungus, which is settled with the help
of migrating birds. Besides populations of this fungus are rather homogeneous
genetically, and it does not have any geographical variations.
In the field of an area with seasonal climate the mycelium of predatory water
mould, as a rule, dies off at formation of ice on surface of water, and survives
in winter as spores. In areas where the temperature of water does not fall
below +4 ?Ñ, predatory water mould successfully winters as a mycelium. Spores
of this fungus sprout on the organic substratum of animal origin - usually
on body of dead small animal, on the rests of prey of any predator, or on shells
of eggs of fishes or amphibians. Proteins of substratum serve for initial development
of small lock of mycelium with several trapping heads. The further development
depends on success of hunting of this fungus.
“Forest goblet” (Eupelicomyces multicapitatus)
Order: Pezizales (Pezizales)
Family: Pezizaceae (Pezizaceae)
Habitat: Chile, humid Nothofagus forests.
Moderate – cold areas of Southern hemisphere in Neocene had kept approximately
the same area, as in human epoch. Though South America had moved a little aside
the South Pole, climate warming in Neocene has caused displacement of border
of warm-moderate climatic zone to poles. Therefore the climate more-less similar
to climate of the most part of Eurasia, in Southern hemisphere was generated
only at the far south of South America. But also here it undergoes great influence
from the part of ocean. Therefore moderately cold snow winter is characteristic
for this area. Summer at the far south of South America is humid, about rather
small amount of dry and hot days. Such weather is favorable for growth of various
mushrooms.
Forests at the south of South America are formed by various species of southern
beech (Nothofagus) – the kind of plants growing in temperate areas of Southern
hemisphere from Mesozoic. Forests of this plant form a habitat for plenty of
mushroom kinds. Also it is very remarkable, that right here instead of rich
in life forests of Amazonia, the largest mushroom of South America, “forest
goblet”, grows.
The body of mushroom consists of false tissue – plectenchyma, which represents
a texture of mycelium fibers. It is lack of strenghtening tissue, therefore
it is absolutely not feasible for a mushroom problem to grow up to the size
of tree. “Forest goblet” exists in fact at the edge of mechanical opportunities
of plectenchyma. It is the huge mushroom reaching one meter height. High humidity
of air favours to growth of its huge fruit body. The fruit body of “forest
goblet” represents huge ramified apothecium of yellow color with brownish shade.
Edges of “pileus” have darker color – they are orange-brown. A consistence
of fruit body is elastic, and the bottom part of stem of mushroom is gristly.
Its “pileus” has strongly concave form, and after morning fog a lot of water
accumulates in it. Streaming down along internal surface of apothecium, water
washes off spores of mushroom. Inside the mushroom small birds frequently arrange
original “swimming baths” for themselves, after which they carry spores of
mushroom on their plumage. In middle part the stem of fruit body branches and
forms some small cup-like slightly irregular-shaped pilei. If branching of
stem takes place higher, instead of one “pileus” of rounded outlines “Siamese
twins” – two, three and even more “pilei” grown together are formed. “Forest
goblet” is not poisonous, but has bitter taste protecting this mushroom from
rodents and birds.
There is one more secret of large size of “forest goblet” – this mushroom forms
mycorhiza with southern beech, receiving from it some of organic substances
instead of mineral substances. The mycelium of “forest goblet” actively participates
in decomposition of wood litter, and its fruit bodies are formed, when in forest
its greatest amount gathers – closer to middle dawn (in Southern hemisphere
approximately in the beginning of April). “Forest goblet” forms mycorhiza with
large species of Nothofagus forming a basis of forests of temperate zone of
Southern hemisphere.
The close species also lives in forests: crested mushroom (Eupelicomyces
cristatus).
It is a mushroom of considerably smaller size, than “forest goblet”: the maximal
height of fruit body is no larger than 15 centimeters. But its fruit bodies
reach the significant size, because “pilei” of this mushroom are not rounded,
but merged to longitudinal crests. The length of such fruit body may reach
30 centimeters. At the fruit body of crested mushroom some crests with spore-producing
surface develop. Their edges are dissected to rounded lobes of reddish-brown
color with bright orange edges. This species does not form mycorhiza and lives
as saprophyte. Its fruit body emits the unpleasant smell involving insects,
and more often spores of this mushroom are distributed by beetles. Fruit bodies
of crested mushroom appear in forest at the end of summer and an early autumn.
Spring ice mushroom (Cryomorchella vernalis)
Order: Pezizales (Pezizales)
Family: Morels (Morchellaceae)
Habitat: steppes of Three-Rivers-Land, Southern Ural, steppes of Southern
Siberia.
Mushrooms are very important component of ecosystems. These organisms occupy
prevailing position among saprotrophs, and due to their vital activity processes
of decomposition of dead organic substances proceeds much faster.
In steppes of Three-Rivers-Land each summer grass plentifully grows on. Herds
of herbivorous mammals feed on it, but they succeed to eat not all growth
of graminoids. When winter begins, rains and small layer of snow force the
withered
grass to the ground, and it starts to decompose. In early spring on slopes
of hills warmed up by sun among yellowish-brown last year's grass mushrooms
of white color appear. It is a species of mushrooms which plays a determining
role in process of decomposition of vegetative rests in steppes of Eurasia
with seasonal climate and cold winter. For the cold endurance and time of
active growth it is named as spring ice mushroom.
This ascomycete has rather low competitiveness, and can be considered as
original analogue of ephemeral plants among mushrooms. Its fruit bodies cannot
be met
in summer when in steppe other species of mushrooms grow. Their mycelium
strongly suppresses growth of mycelium of spring ice mushroom, and this species
as if
vanishes from steppe to the most part of year. Within several months, since
late spring up to middle of an autumn, spring ice mushroom is kept only as
resting spores in ground.
When autumn and winter colds begin, the majority of mushrooms stop growing,
and their mycelium develops much slower. Colds serve as stimulus for sprouting
of spores of spring ice mushroom – its spores develop, when the day time
temperature falls up to +5°Ñ, and there are frosts at night. From late autumn
till early
spring the mycelium of this species develops on rests of last year's grass.
In some places the mycelium of spring ice mushroom forms extended textures
under layer of rotten grass. When the top layer of ground freezes through,
growth of mycelium stops, but after the first days of thawing weather it
renews.
In the beginning of spring, when the sun warms up the top layer of ground
enough, spring ice mushroom for a short time turns to sun-worshipper. From
under layer
of last year's grass its fruit bodies appear plentifully. They may be so
numerous, that some slopes from apart seem strewn with snow. The fruit body
of spring
ice mushroom is separated to small wrinkled pileus similar to dried up apple
about 2 – 3 cm in diameter, and thin stem up to 15 cm high. These mushrooms
grow very quickly, and the fruit body develops completely during approximately
3 – 4 days. Despite of fragile appearance, this mushroom has excellent vitality.
It endures frosts and a snowfall which frequently come back in spring.
Spores of spring ice mushroom develop on the surface of its pileus, in thin
layer of slime. The main carriers of spores of spring ice mushroom are steppe
herbivorous mammals – porcippulas, harelopes and other animals. After winter
food shortage herbivores willingly bite off pileuses of this mushroom, despite
of its bitterish taste, and carry spores of mushroom with their manure. The
cover of spores of spring ice mushroom is rather strong, and it is not damaging
staying in gastroenteric path neither of mammals, nor of grubs of dung beetles.
“Forest lantern” (Mycolanterna extralucens)
Order: Gilled mushrooms (Agaricales)
Family: Pale-spore mushrooms (Tricholomataceae)
Habitat: rainforests of northern part of Meganesia.
Among factors of natural selection for any kind of live organisms there is
the mode of its interaction with environmental species of live organisms.
This factor becomes especially important, and even determining, when the
connection,
taking place between two species, becomes stronger, and dependence on it
from the part of one or both species increases. Dependence on other species
becomes
determining at parasites for which the host species becomes an inhabitancy.
Coevolution results in evolving of species adapted to coexistence with
one or several species of live organisms. One example of this phenomenon
is shown
by mushroom living in rainforests of Meganesia. It has ability to glow
very brightly, and it is directly connected with mode of its relations
with some
species of animals living near to it. It is small pileate basidium mushroom,
which is a symbiote of lamplighter bird and lantern
ant. The bright luminescence
had determined the name of mushroom – “forest lantern”. At night under
rainforest canopy congestions of these mushrooms are well appreciable from
apart.
“Forest lantern” grows on rotten wood. It plentifully expands on heaps
of pieces of rotten wood gathered by lamplighter bird specially for this
purpose,
and
without care from the part of this bird it lives on moldering tree trunks.
But “wild” populations of mushroom grow less intensively, than ones the
lamplighter bird looks after. It is explaining by following reason: on
heaps of lamplighter
bird mushroom has another ally – lantern ant. It also settles in heaps
of pieces of rotten wood gathered by lamplighter bird, and eats not only
insects,
but
also mycelium of various species of mushrooms. Its saliva contains substances
which stimulate growth of mycelium of “forest lantern”. In places of ant
stings the mycelium of “forest lantern” forms original inflows which are
eaten willingly
by lantern ants. Activity of ants selectively exterminates the species
of mushrooms competing with “forest lantern” for nutrients. Without care
the
mycelium of
“forest lantern” quickly reaches physiological maturity, but exists not
for long, and within two years completely degrades and is superseded by
other
species of wood-attacking mushrooms. On heaps of lamplighter bird at care
of lantern
ant this mushroom exists much longer, and forms a plenty of fruit bodies.
These mushrooms are not poisonous for terrestrial vertebrates, and they
are eaten
occasionally by large forest birds and marsupial mammals.
Fruit bodies of “forest lantern” form congestions up to 20 cm in diameter,
weighting about 400 grams. The luminescence is by-product of life processes
of mushroom, but in process of coevolution just this property had determined
success in existence of this species of mushrooms. Lamplighter birds till
the centuries searched in forest of pileuses of most brightly glowing specimens
of “forest lantern”, and brought them to their constructions. As a result
of
such selection from the part of birds “forest lantern” glows much brighter,
than species from close genera. The fruit body of “forest lantern” has
conic pileus on long stem. Hymenium of this mushroom is lamellar, and edges
of
lamellas glow especially bright. The mushroom emits greenish-white light
which shade
varies at different populations. Light of single mushroom seems not too
bright, but “forest lantern” forms the close joints numbering up to 2 –
3 tens of
fruit bodies. Light emitting by thickets of “forest lantern”, would allow
human eye
to notice a small insect at the distance of about 40 cm from joint of mushrooms
at moonless night.
“Forest lantern” grows quickly – the completely developed fruit body forms
within three days and is kept about one week. Dying off fruit bodies cease
glowing, and lamplighter bird, as a rule, carries them off from its “mushroom
bed”.