Part 43
In this manner the woods of northern countries are sown with junipers, by the thrushes and other birds which feed upon these heavy berries. The cross-bill lives upon fir-cones, and the hawfinch upon pine-cones; by means of which the fir and the pine, of various species, are continually planted in vast abundance. In our own country, the common rook has been observed, not only to feed on acorns, but to make holes in the ground with the bill, and hide many: probably they mean only to lay in a stock for future necessity by this process; but certain it is, that thousands of oaks are annually planted by this means. Swine, also, in searching for food, turn up the earth; and moles, by throwing up hillocks, prepare the ground for seeds of various kinds. Seas, lakes, and rivers, by their streams and currents, often convey seeds unhurt to distant countries.
In assimilating the animal and vegetable kingdoms, Linnæus denominates seeds the eggs of plants. The fecundity of plants is frequently marvellous: from a single plant or stalk of Indian Turkey wheat, are produced, in one summer, 2000 seeds; of elecampane, 3000; of sun-flower, 4000; of poppy, 32,000; of a spike of cat's-tail, 10,000 and upwards; a single fruit or seed-vessel of tobacco, contains 1000 seeds; that of white poppy, 8000. Mr. Ray relates, from experiments made by himself, that 1012 tobacco seeds are equal in weight to one grain; and that the weight of the whole quantum of seeds in a single tobacco plant, is such as must, according to the above proportion, determine their number to be 360,000. The same author estimates the annual produce of a single stalk of spleen-wort to be upwards of 1,000,000 of seeds.
PRODIGIOUS NUMBER OF PLANTS UPON THE EARTH.--It is said, that there are about 44,000 different plants already discovered, to which new ones are daily added. By means of the microscope, some have been found where they were least expected. The different varieties of mosses and sponges have been classed among vegetables, and have presented to the observation of the naturalist, seeds and flowers before unknown. Freestone is sometimes covered with brown and blackish spots; the mouldy substance which composes them adheres to various other matters, and may be considered as a little garden in vegetation. When we reflect upon the quantity of moss which covers the hardest stones, the trunks of trees, and the most barren places;--when we consider the quantity of vegetables upon the surface of the earth; the different species of flowers which delight and refresh us; the trees and bushes, add to these the aquatic plants, some of which exceed a hair in fineness;--we may be able to form some idea of the multitude of plants in the vegetable kingdom. All these species grow up, and are preserved without detriment or injury, each having that place assigned it, which is most suited to its properties. Such is the wisdom displayed in their distribution over the surface of the earth, that there is no part of it wholly destitute, and no part enjoys them in too great abundance. Some plants require the open field, where, unsheltered by trees, they may receive the sun's rays; others can only exist in water; some grow in the sand; others in marshes and fens, which are frequently covered with water, and some bud on the surface of the earth, whilst others unfold themselves in its bosom. The different strata which compose the soil of the earth, as sand, clay, chalk, &c. favour different vegetables; and hence it is, that in the vast garden of nature nothing is absolutely sterile; from the finest sand to the flinty rock, from the torrid to the frozen zone, each soil and climate supports plants peculiar to itself. Another circumstance highly worthy of attention is: the Creator has so ordered, that, among this immense variety of plants, those which are most proper for food or medicine multiply in greater abundance than those which are of less utility. Herbs are much more numerous than trees and brambles; grass is in greater abundance than oaks; and cherry-trees more plentiful than apricots: had oaks been more frequent than grass, or trees than herbs and roots, it would have been impossible for animals to subsist.
According to the calculation of Baron Von Humboldt, 6000 plants are _agamous_, that is, plants which have no sexual organs, such as champignons, lichens, &c. Of the remainder there are found--
In Europe 7,000 In the temperate regions of Asia 1,500 In Equinoxial Asia, and the adjacent Islands 4,500 In Africa 3,000 In the temperate regions of America, in both hemispheres 4,000 In Equinoxial America 13,000 In New Holland, and the Islands of the Pacific Ocean 5,000 ------ Total 38,000 ------
SENSIBILITY OF PLANTS.--There are certain motions observable in plants, that make it doubtful whether they are not possessed of sensibility. Some plants shrink and contract their leaves upon being touched; others open and shut their flowers at certain fixed hours in the day, so regularly as to denote with precision the time of day; some assume a peculiar form during the night, folding up their leaves; and these different changes take place whether they are in the open air, or shut up in close apartments. Those which live under water during the time of fecundation, raise their flowers above the surface.
The motions of a marshy plant discovered some time since, in the province of Carolina, are still more singular. Its round leaves are furnished above, and on the sides, with a multitude of notches that are extremely irritable. When an insect happens to creep upon the superior surface of the leaves, they fold up, and inclose the insect till it dies; the leaves then open of themselves. We may daily observe regular motions in some plants in our gardens. Tulips expand their petals when the weather is fine, and close them again at sun-set, or during rain. Vegetables with pods, such as peas and beans, open their shells when dry, and curl themselves up like shavings of wood. Wild oats, when placed upon a table, will move spontaneously, more especially if warmed in the hand. And the heliotrope, or sunflower, with various other plants, always turns towards the sun. These are incontestable facts, of the certainty of which every person may be easily convinced. From them, some conclude that we ought not to deny sensibility to be an attribute of plants; and certainly the facts which are alleged in favour of such an opinion, give it great appearance of probability. But, on the other hand, plants have no other sign of sensibility; and all that they have is entirely mechanical. We plant a shrub and destroy it, without finding any analogy between it and an animal, that we bring up and kill. We see a plant bud, blossom, and bear seed, insensibly, as the hand of a watch runs round the points of the dial. The most exact anatomy of a plant does not unfold to us any organ which has the least relation to those of animal sensibility. When we oppose these observations to those from which we might infer the sensibility of plants, we remain in uncertainty, and we cannot explain the phenomena related above. Our knowledge upon this subject is very imperfect, and is confined to simple conjecture. We neither attribute sensibility to plants, nor deny it to them, with certainty.
THE SENSITIVE PLANT.--This singular plant rises from a slender woody stalk seven or eight feet in height, armed with short recurved thorns; the leaves grow upon long footstalks, which are prickly, each sustaining two pair of wings; from the place where these are inserted, come out small branches, having three or four globular heads of pale purplish flowers coming out from the side, on short peduncles; the principal stalk has many of those heads of flowers on the upper part, for more than a foot in length; this, as also the branches, is terminated by like heads of flowers; the leaves move but slowly when touched, but the footstalks fall, when they are pressed pretty hard. It is a native of Brazil, (_M. pudica_, humble plant,) having the roots composed of many hairy fibres, which mat slowly together; from these come out several woody stalks, declining towards the ground, unless supported; they are armed with short recurved spines, having winged or pinnate leaves; flowers from the axils, on short peduncles, collected in small globular heads, of a yellow colour.
"Naturalists (says Dr. Darwin) have not explained the immediate cause of the collapsing of the sensitive plant; the leaves meet and close in the night, during the sleep of the plant, or when exposed to much cold in the day-time, in the same manner as when they are affected by external violence, folding their upper surfaces together, and in part over each other like scales or tiles, so as to expose as little of the upper surface as may be to the air, but do not, indeed, collapse quite so far; for when touched in the night during their sleep, they fall still further, especially when touched on the footstalks between the stems and the leaflets, which seem to be their most sensitive or irritable part. Now, as their situation after being exposed to external violence resembles their sleep, but with a greater degree of collapsion, may it not be owing to a numbness or paralysis consequent to too violent irritation, like the pantings of animals from pain or fatigue? A sensitive plant being kept in a dark room till some hours after day-break, its leaves and leaf-stalks were collapsed as in its most profound sleep, and on exposing it to the light, above twenty minutes passed before the plant was thoroughly awake, and had quite expanded itself. During this night the upper surfaces of the leaves were oppressed; this would seem to shew that the office of this surface of the leaf was to expose the fluids of the plant to the light, as well as to the air." Dr. Darwin has thus characterized these plants.--
Weak with nice sense the chaste Mimosa stands, From each rude touch withdraws her timid hands Oft as light clouds o'erpass the summer glade, Alarm'd, she trembles at the moving shade; And feels alive through all her tender form, The whisper'd murmurs of the gathering storm; Shuts her sweet eyelids to approaching night, And hails with freshen'd charms the rising light.
CHAP. XXXIV.
CURIOSITIES RESPECTING VEGETABLES.--(_Continued._)
_The Cocoa-Nut Tree--The Bread-Fruit Tree--The Bannian Tree--Fountain Trees--The Tallow Tree--The Paper Tree--The Calabash Tree--Remarkable Oak--Dimensions, &c. of some of the largest Trees now growing in England--Upas, or Poison Tree._
Admiration, feeding at the eye, And still unsated, dwells upon the theme. _Cowper._
THE COCOA-NUT TREE.
Of all the gifts which Providence has bestowed on the Oriental world, the cocoa-nut tree most deserves our notice: in this single production of nature, what blessings are conveyed to man! It grows a stately column, from thirty to fifty feet in height, crowned by a verdant capital of waving branches, covered with long spiral leaves; under this foliage, branches of blossoms, clusters of green fruit, and others arrived at maturity, appear in mingled beauty. The trunk, though porous, furnishes beams and rafters for our habitations; and the leaves, when platted together, make an excellent thatch, common umbrellas, coarse mats for the floor, and brooms; while their finest fibres are woven into very beautiful mats for the rich. The covering of the young fruit is extremely curious, resembling a piece of thick cloth, in a conical form, close and firm as it came from the loom; it expands after the fruit has burst through its inclosure, and then appears of a coarser texture. The nuts contain a delicious milk, and a kernel sweet as the almond: this, when dried, affords abundance of oil; and when that is expressed, the remains feed cattle and poultry, and make good manure. The shell of the nut furnishes cups, ladles, and other domestic utensils, while the husk which incloses it is of the utmost importance; it is manufactured into ropes and cordage of every kind, from the smallest twine to the largest cable, which are far more durable than those of hemp. In the Nicobar islands, the natives build their vessels, make the sails and cordage, supply them with provisions and necessaries, and provide a cargo of arrack, vinegar, oil, gagpree or coarse sugar, cocoa-nuts, coir, cordage, black paint, and several inferior articles, for foreign markets, entirely from this tree.
Many of the trees are not permitted to bear fruit; but the embryo bud, from which the blossoms and nuts would spring, is tied up, to prevent its expansion; and a small incision being then made at the end, there oozes in gentle drops a cool pleasant liquor, called Trace, or Toddy, the palm wine of the poets. This, when first drawn, is cooling and salutary; but when fermented and distilled, produces an intoxicating spirit. Thus, a plantation of cocoa-nut trees yields the proprietor considerable profits, and generally forms part of the government revenue.
THE BREAD-FRUIT TREE.--The systematic name of this plant is Artocarpus, which is merely the English name translated into Greek. There are several species; particularly _A. incisa_, and _A. integrifolia_.
The genuine bread-fruit tree is the _artocarpus incisa_. In captain Cook's Voyage, it is observed, that the bread-fruit tree is about the size of a middling oak; its leaves are frequently a foot and a half long, oblong, deeply sinuated, like those of the fig-tree, which they resemble in consistence and colour, and in exuding a milky juice when broken. The fruit is the size and shape of a child's head, and the surface is reticulated, not much unlike a truffle; it is covered with a thin skin, and has a core about as big as the handle of a small knife; the eatable part lies between the skin and core; it is as white as snow, and of the consistence of new bread. It must be roasted before it is eaten, being first divided into three or four parts; its taste is insipid, with a slight sweetness, somewhat resembling that of the crumb of wheaten bread, mixed with Jerusalem artichoke. The fruit not being in season all the year, there is a method of supplying this defect, by reducing it to sour paste, called _makie_; and besides this, cocoa-nuts, bananas, plantains, and a great variety of other fruits, come in aid of it. This tree not only supplies food, but also clothing, for the bark is stripped off the suckers, and formed into a kind of cloth. To procure the fruit for food costs the Otaheiteans no trouble or labour, but climbing a tree. This most useful tree is distributed very extensively over the East Indian continent and islands, as well as the innumerable islands of the South Seas. In Otaheite, however, and some others, the evident superiority of the seedless variety for food has caused the other to be neglected, and it is consequently almost worn out.
We are informed by Captain King, that in the Sandwich islands these trees are planted, and flourish with great luxuriance on rising grounds; that they are not indeed in such abundance, but that they produce double the quantity of fruit to those growing on the rich plains of Otaheite; that the trees are nearly of the same height, but that the branches begin to strike out from the trunk much lower, and with greater luxuriance; and that the climate of these islands differs very little from that of the West Indian islands which lie in the same latitude. This reflection probably first suggested the idea of conveying this valuable tree to our islands in the West Indies. For this purpose his Majesty's ship the Bounty sailed for the South Seas, on the 23d of December, 1787, under the command of Lieutenant William Bligh. But a fatal mutiny prevented the accomplishment of this benevolent design. His Majesty, however, not discouraged by the unfortunate event of the voyage, and fully impressed with the importance of securing so useful an article of food as the bread-fruit to our West Indian Islands, determined, in the year 1791, to employ another ship, for a second expedition on this service; and, in order to secure the success of the voyage as much as possible, it was thought proper that two vessels should proceed together on this important business. Accordingly, a ship of 400 tons, named the Providence, was engaged for the purpose, and the command of her given to Captain Bligh; and a small tender, called the Assistant, commanded by Lieut. Nathaniel Portlock. Sir Joseph Banks, as in the former voyage, directed the equipment of the ship for this particular purpose. Two skilful gardeners were appointed to superintend the trees and plants, from their transplantation at Otaheite, to their delivery at Jamaica; and Captain Bligh set sail on the 2d of August, 1791. The number of plants taken on board at Otaheite, was 2634, in 1281 pots, tubs, and cases; and of these 1151 were bread-fruit trees. When they arrived at Coupang, 200 plants were dead, but the rest were in good order. Here they procured ninety-two pots of the fruits of that country. They arrived at St. Helena, with 830 fine bread-fruit trees, besides other plants. Here they left some of them, with different fruits of Otaheite and Timor, besides mountain rice and other seeds; and hence the East Indies may be supplied with them.
On their arrival at St. Vincent's, they had 551 cases, containing 678 bread-fruit trees, besides a great number of other fruits and plants, to the number of 1245. Near half this cargo was deposited here under the care of Mr. Alexander Anderson, the superintendant of his Majesty's botanic garden, for the use of the Windward islands; and the remainder, intended for the Leeward islands, was conveyed to Jamaica, and distributed as the governor and council of Jamaica were pleased to direct. The exact number of bread-fruit trees brought to Jamaica, was 352; out of which, five only were reserved for the botanic garden at Kew. Captain Bligh had the satisfaction, before he quitted Jamaica, of seeing the trees, which he had brought with so much success, in a most flourishing state; insomuch that no doubt remained of their growing well, and speedily producing fruit: an opinion which subsequent reports have confirmed.
The bread-fruit, when perfectly ripe, is pulpy, sweetish, putrescent, and in this state is thought to be too laxative; but when green it is farinaceous, and esteemed a very wholesome food, either baked under the coals, or roasted over them. The taste is not unlike that of wheaten bread, but with some resemblance to that of Jerusalem artichokes or potatoes. It was mentioned before, that a sort of cloth was made of the inner bark: to this we may add, that the wood is used in building boats and houses; the male catkins serve for tinder; the leaves for wrapping their food in, and for wiping their hands instead of towels; and the juice for making bird-lime, and as a cement for filling up the cracks of their vessels, and for holding water. Three trees are supposed to yield sufficient nourishment for one person.
THE BANNIAN TREE.--The bannian, or Indian fig-tree, is a native of several parts of the East Indies, and has a woody stem, branching to a great height and vast extent. It is universally considered as one of the most beautiful of nature's productions; and, contrary to most other things in animal and vegetable nature, appears exempted from decay. Every branch from the main body throws out its own roots, at first in small tender fibres, several yards from the ground, but which thicken considerably before they reach the surface, and then, striking in, they increase to large trunks, and become parent trees, shooting out new branches from the top; these in time suspend their roots, which, swelling into trunks, produce other branches, thus continuing in a progressive state as long as the earth, the common parent of them all, continues her sustenance. The Hindoos are peculiarly fond of the bannian tree; they regard it as an emblem of the Deity, from its long duration and overshadowing beneficence, and almost pay it divine honours. Near this tree their most esteemed pagodas are generally erected; and under their shade the Brahmins spend their days in religious solitude, wandering among the cool recesses and beautiful walks of this umbrageous canopy, impervious to the hottest beams of a tropical sun.
A remarkably fine tree of this kind grows on an island in the river Narbedda, in the province of Guzerat. It is distinguished from others of the same species by the name of Cubbeer Bur, which was given it in honour of a famous saint. It was once much larger than it is at present, high and violent floods having carried away the banks of the island on which it grew, and with them such parts of the tree as have thus far extended its roots. What remains, is two thousand feet in circumference, measured round the principal stems; the overhanging branches, which have not yet struck down, cover a much larger space. The chief trunks of this single tree, each of which in size exceeds our English oaks or elms, amount to 350, the smaller stems to more than 3000, all casting out new branches and hanging roots, to form in time parent trunks. Cubbeer Bur is famed through India for its amazing extent and beauty. The Indian armies frequently encamp around it, and at stated periods solemn festivals are held under its branches, where thousands of votaries repair from various parts of the empire. It is even said that 7000 persons found ample room under its shade. The English gentlemen sometimes form elegant and extensive encampments, where they spend whole weeks together under this delightful pavilion, which is inhabited by green wood-pigeons, doves, and peacocks, and also a variety of feathered songsters; families of monkeys are also in every quarter playing their antic tricks; and bats, to the astonishing size of six feet, from the extremity of one wing to that of the other. This tree not only shelters, but affords sustenance to these numerous inhabitants, being covered, amidst its bright leaves, with small figs of a rich scarlet, on which they regale.
FOUNTAIN TREES.--These are very extraordinary vegetables, growing in one of the Canary Islands, and likewise said to exist in some other places, which distil water from their leaves in such plenty, as to answer all the purposes of the inhabitants who live near them. Of these trees we have the following account, in Glasse's History of the Canary Islands. "There are three fountains of water in the whole island of Hiero, wherein the fountain tree grows. The larger cattle are watered at those fountains, and at a place where water distils from the leaves of a tree. Many writers have made mention of this famous tree, some in such a manner as to make it appear miraculous: others again deny the existence of any such tree; among whom is Father Feyjoo, a modern Spanish author. But he, and those who agree with him in this matter, are as much mistaken as those who would make it appear to be miraculous. The author of the History of the Discovery and Conquest, has given us a particular account of it, which I shall here relate at large.--