. 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. II0A7 PLANTS GROW YUOM THE SEKD. 21 into sugar, and dissolved in the water â which is absorbed from the ground ; the coty- ledon imbibes tliis, and sends it into the radicle, r, to make the root, and into the plumule, p, enabling it to develop the set of leaves, "wrapped up one within another, of which it consists, and expand them one after another in the ah*. Fig. 47 shows a s
. 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. II0A7 PLANTS GROW YUOM THE SEKD. 21 into sugar, and dissolved in the water â which is absorbed from the ground ; the coty- ledon imbibes tliis, and sends it into the radicle, r, to make the root, and into the plumule, p, enabling it to develop the set of leaves, "wrapped up one within another, of which it consists, and expand them one after another in the ah*. Fig. 47 shows a sprouting grain, sending down its first root, and sending up the plumule still rolled together. Fig. 48 is the same, more advanced, having made a whole cluster of roots, and unfolded two or three leaves. Nourished abundantly as it is, both by the maternal stock in the grain, and by what these roots and leaves obtain and prepare from the soil and the air, the young corn gets a good start, is ready to avail itself of the summer's heat, to complete its vegeta- tion, to blossom, and to make and lay up the great amount of nourishment which we gather in the crop. 4G. Tlie Onion. The cotyledon in Indian Corn, and ^t other plants which have only one, stays under ground. In the Onion it comes up and makes the iii'st leaf, â a slender, thread-shaped one, â and in- deed it carries up the light seed on its summit. In Indian Corn, all the early joints of stem remain so short as not to be seen ; although later it makes long joints, carrying up the upper leaves to some distance from one another. In the Onion, on the conti'ary, the stem never lengthens at all, but remains as a thin plate, broader than it is long, with the roots springing from one side of it and the sheathing bases of the leaves coverin": it on the other. 47. Number of Cotyledons cr Seed-leaves. Indian Corn (Fig. 46) and all such kinds of grain-plant^, the Onion, Lilies, and the hke, have only one seed-leaf or cotyle
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