12 



A 1'ATTEKN PLANT. 



[SECTION -2. 



11. Uu committing these seeds to moist aud warm soil they soon sin-out, 

 i. e. yt'?iniii<i/. . The- very short stem-part of the embryo is the first to 

 grow. It lengthens, protrudes its root-end; this turns downward, if not 

 already pointing in that direction, and while it is lengthening a root form.-- 

 ai its point and grows downward into the ground. This root continues to 

 grow on from its lower end. and thus insinuates itself aud 

 penetrates into the soil. The stem meanwhile is adding 

 to its length throughout; it erects itself, and, seeking the 

 light, brings the seed up out of the ground. The mate- 

 rials for this growth have been supplied by the cotyledous 

 or seed-leaves, still in the seed: it was the store of nour- 

 ishing material they held which gave them their thickish 

 shape, so unlike that of ordinary leaves. Now, relieved of 

 a pan of this store of food, which has formed the growth by 

 which they have been raised into the air 

 nnd light, they appropriate the remain- 

 der to their own growth. In enlarging 

 they open aud throw oil' the seed-husk; 

 they expand, diverge into a horizontal 

 position, turn green, and thus become 

 a pair of evident leaves, the first foliage 

 of a liny plant. This seedling, although 

 diminutive and most simple, possesses 

 and puts into use, all theOiu,\Ns of 

 YI:<;I:TATION, namely, root, stem, and 

 leaves, each in its proper element, the 

 root in the soil, the stem rising out of 

 il, (lie leaves in the light and open air 

 It now dra\\s in moisture and some 657 



food-materials from the soil b\ its root, 



conveys this through the stem into the leaves, where these materials, along 

 wilii other crude food which these imhibe from the air, are assimilated into 

 \egelalile mailer, i.e. into the material for further growth. 



12. Further Growth, soon proceed- to the formation of new parts, 

 downward in the production of more root, or of branches of the main root, 

 upward in the development of more stem and leaves. That from which a 

 stem with ils leaves is continued, or a new stem (i.e. branch) originated, is 

 a l>ri>. The most conspicuous and familiar buds are those of most shrubs 

 and trees, bearing buds formed in summer or autumn, to grow the following 



I'l... 6. F.aih l'la\ aeedlillg ; stem (caulicle), root at lower cud, expanded seed- 

 , (entylediins) at the other: minute bud (plumule) bet ween these. (i. Same 



later; the bud developed into econd pair of leaves, with hardly any stem-part Vie- 

 low them; then into a third pair of leave-, rai-ed on a short joint of stem : and a 

 fifth leaf also showiir:. 7. Same still older, with more leaves developed, hut. tie BI 

 siu;.:l\ (one aft. r another), and with joints of stem between them. 



