When young, the leaf may be seen in the form of a deep cup or vase surrounded with ribs, at that time comparatively small, the whole green expanse of the adult leaf covered in between them in regular rows of puffings. As the ribs grow their ramifications stretch out in every direction, the leaflets one by one unfolding to fill the ever-widening spaces; till at last, when it reaches the surface of the water, it rests horizontally above it without a wrinkle—the colossal leaf being thus supported by a heavy scaffold of ribs beneath it, sufficient not only to support the light-stepping jacana, but even a young child. Some of the leaves have a diameter of from four to five feet; some may grow even to a larger size.
“Here, seen in its own home, it has in addition to its own beauties the charm of harmony with all that surrounds it,” observes Mrs Agassiz,—“with the dense mass of forest, with palm and parasite, with birds of glowing plumage, with insects of all bright and wonderful tints, and with fishes which, though hid in the water beneath it, are not less brilliant and varied than the world of life above.”
Palms.
Almost countless are the varieties of trees in the Amazonian forests, and wonderful the diversity in their combination. Rarely is the soil found occupied for any extent by the same kind of tree. A vast proportion are yet unknown to science. The palms surpass in number and variety all their sylvan brethren. They differ wonderfully in form and size: some, sturdy giants towering up towards the sky with wide-spreading branches; others, delicate little pigmies with slender stems and small broom-like crowns; while others assume the form of creepers, and wind in many folds round the supporting trunks of other trees.
“Among them are four essentially different forms:—the tall ones, with a slender and erect stem, terminating with a crown of long feathery leaves, or with broad fan-shaped leaves,” remarks Professor Agassiz; “the bushy ones, the leaves of which rise, as it were, in tufts from the ground, the stem remaining hidden under the foliage; the brush-like ones, with a small stem, and a few rather large leaves; and the winding, creeping, slender species. Their flowers and fronds are as varied as their stalks. Some of these fruits may be compared to large woody nuts with a fleshy mass inside, others have a scaly covering, others resemble peaches or apricots, while others, still, are like plums or grapes. Most of them are eatable, and rather pleasant to the taste.”
Among the most beautiful is the mauritia, or miriti, with
pendent clusters of reddish fruit; its enormous, spreading, fan-like leaves cut into ribbons. Contrasted with it appears the manicaria, or the bussu, with stiff entire leaves, some thirty feet in length, almost upright, and very close in their mode of growth, and serrated all along their edges. The leaves all sprout from, a comparatively short stem.
More curious is the raphia, with plume-like leaves, sometimes from forty to fifty feet in length, starting also from a short stem—almost from the ground. Its vase-like form is peculiarly graceful and symmetrical.
Among the most curious is the pashiüba barrigudo, or bulging-stemmed palm (Iriartea ventricosa); which, rising on a pyramid of roots for several feet, runs up in a single column for some distance, and then swells in a curious spindle-form, again to assume the same proportions as below, till its head spreads out in several fan-like branches with web-shaped leaflets. The tree looks as if supported on stilts, and a person can stand upright among the roots of old trees with the perpendicular stem above his head. These roots have the form of straight rods, and are studded with stout thorns, whilst the trunk is quite smooth. The purpose of this curious arrangement is probably to recompense the tree by root-growth above the soil for its inability, in consequence of the competition of neighbouring roots, to extend itself underground.