. Botany for young people and common schools. How plants grow, a simple introduction to structural botany. With a popular flora, or an arrangement and description of common plants, both wild and cultivated. Botany. 18 now PLANTS GROW FROM THE SEED. 41. Tlie seed-leaves of the Bean are thickened by having so much nourishment stored up in tliem, so much of it that they make good food for men. And the object of this large suj^ply is that the })lant may grow more strongly and rapidly f]-om the seed. It need not and it does not wait, as the Maple and the Morning-Glory do, slowly to make the second
. Botany for young people and common schools. How plants grow, a simple introduction to structural botany. With a popular flora, or an arrangement and description of common plants, both wild and cultivated. Botany. 18 now PLANTS GROW FROM THE SEED. 41. Tlie seed-leaves of the Bean are thickened by having so much nourishment stored up in tliem, so much of it that they make good food for men. And the object of this large suj^ply is that the })lant may grow more strongly and rapidly f]-om the seed. It need not and it does not wait, as the Maple and the Morning-Glory do, slowly to make the second pair of leaves ; but is able to develop these at once. Accordingly, the rudiments of these next leaves may be seen in the seed before growth begins, in the form of a little bud (Fig. oo, p), ready to grow and unfold as soon as the thick seed-leaves themselves appear above ground (Fig. 34), and soon making the first real foliage (Fig. 35). For the seed-leaves of the Bean are themselves so thick and ungainly, that, although they turn green, they hardly serve for foliage. But, having given up their great stock of nourishment to the forming root and new leaves, and enabled these to grow much stronger and . faster than they otherwise could, they wither and fall off. It is nearly the same in 42. The Cherry, Almond, &C. Fig. 36 is an Almond taken out of the shell, soaked a little, and the thin seed-coat removed. The whole is an embryo, consisting of a pair of large and thick seed- leaves, loaded with sweet nour- ishment. These are borne on a very short radicle, or stemlct, which is seen at the lower end. Pull off one of the seed-leaves, as in Fig. 37, and you may see the plumule or little bud, p, ready to develop leaves and stem upwards, Avhile the other end of the radicle grows downward and makes the root; the rich store of nourishment in the seed-. -=^'A. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability -
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Keywords: ., bookidbotanyforyoungpe00graybookyear1867, c1858bookdecade1860bo
