. The elements of botany for beginners and for schools. Botany. 16 SEEDLINGS. [section 3. to the large store of nutritive matter they contain, and this prevents their developing into actual leaves. Correspondingly, their caulicle does not lengthen to elevate them above the surface of the soil; the growth below the cotyledons is nearly all of root. It is the Utile plumule or bud between. them which makes the upward growth, and which, being well fed by the cotyledons, rapidly develops the next pair of leaves and raises them upon a long internode, and so on. The cotyledons all the while remain be
. The elements of botany for beginners and for schools. Botany. 16 SEEDLINGS. [section 3. to the large store of nutritive matter they contain, and this prevents their developing into actual leaves. Correspondingly, their caulicle does not lengthen to elevate them above the surface of the soil; the growth below the cotyledons is nearly all of root. It is the Utile plumule or bud between. them which makes the upward growth, and which, being well fed by the cotyledons, rapidly develops the next pair of leaves and raises them upon a long internode, and so on. The cotyledons all the while remain below, in the husk of tlie fruit and seed, and perish when they have yielded up the store of food which they contained. 23. So, even in plants so mucli alike as Maples, there is considerable difference in the amount of food stored up in the cotyledons by which the growth is to be made; and there are corresponding differences in the ger- FiG. 14. One of the pair of keys or winged fruits of Red Maple; the seed-bear- ing portion cut open to show the seed. 15. Seed enlarged, and divided to show the crniTipIed embr3-o which fills it. 16. Embryo taken out and partly opened. 17. Embryo which has unfolded in early stage of germination and begun to grow. 18. Seedling with next joint of stem and leaves apparent; and 19 with these parts full-grown, and bud at apex for further growth. 20. Seedling with another joint of stem and pair of 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 not perfectly resemble the original Gray, Asa, 1810-1888. New York American Book Co
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Keywords: ., bookpublishernewyorkamericanboo, booksubjectbotany, bookyear1887
