. La chambre : lecteur scientifique illustré de gravures sur bois. Les lecteurs. Les organes des plantes nutritives. Mauvais exemple de ceci est vu dans l'arbre de banian de l'Inde, de la grande- de branches dont les racines descendent directement sur le terrain, de sorte qu'une grande verrière de branches et de feuilles est formé, appuyé par de nombreux. Fig. 73.-l'arbre Banyan. hautes colonnes. Un Banyan Tree a été décrit n'ayant pas moins de 350 tiges égale à grands chênes, et plus de 3000 petits, couvrant un espace suffisant pour contenir 7000 personnes. Tubercules et bulbes.-Certaines racines douce houle très favorable en circu

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. Chamber's scientific reader : illustrated with wood engravings. Readers. NUTRITIVE ORGANS OF PLANTS. Ill example of this is seen in the banyan-tree of India, from the wide- spreading branches of which roots descend straight to the ground, so that a vast canopy of branches and leaves is formed, supported by numerous. Fig. 73.—The Banyan-tree. tall columns. A banyan-tree has been described having no fewer than 350 stems equal to large oaks, and more than 3000 smaller ones, covering a space sufficient to contain 7000 persons. Tubers and Bulbs.—Some soft roots swell very much in favourable circumstances, storing up in their cells nourishment for the future wants of the plant. The swelling takes place in various forms. The turnip and the carrot afford instances of two of the most common forms. The tubers1 of the potato are not properly parts of the root, but short and thick subterranean stems, the eyes being buds ready to send up shoots into the air in the spring of the following year, and the substance of the tuber being a provision for the nourishment of these shoots, until they become independent of the parent plant. Bulbs also, as those of the onion, the lily, and the hyacinth, are not really parts of the root, although we familiarly speak of such plants as bulbous-rooted, and of the potato and the Jerusalem artichoke as tuberous-rooted. A bulb is, in fact, a subterranean bud, and the true stem is the very short hard part at its base from which the roots spring. Stems.—Some plants have their stems entirely underground; not only those which have extremely short stems, and are commonly described as stemless, but some also in which the stem extends to a considerable length. A root-like stem, creeping underground, or along the surface of the 1 Latin, «a swelling, ' from tumeo, to swell.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may

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