94 OBJECT LESSONS IN BOTANY. 
189. As to the seed-kernel, 
it may consist of two parts, 
namely, the germ and albu- 
men, or it may be all germ. 
190. In the Bean (Fig. 311) 
it isall germ. A better name 
for the germ is embryo. Now 
in all seeds, the embryo is, in 
fact, a miniature plant, consist- 
ing of three parts, viz., radi- Pate 
Fig. 811. Seed of Bean, without its 
cle, plumule, cotyledons. In chen: ¢, are the two cotyledons; 7, the 
this Bean, 7 is the radicle, p radicle; p, the plumule. 
ci Fig. 312. Seed of Wheat, cut open: ais 
is the plu g aan 
plumule, ¢, ¢, are the the albumen; ¢, the one cotyledon; p, 
cotyledons. plumule; 7, radicle. 
814 315 316 31T 
Fig. 318. Seed of Four-o’clock ; embryo two-cotyledoned, coiled; a, albumen. 
Fig. 314. Seed of Heather. Fig. 315. A section of the same, showing the curved 
embryo, with two cotyledous, lying in albumen. 
Fig. 316 Seed of Onion. Fig. 817. Section of the same, showing the coiled em- 
bryo, one cotyledon, in albumen. 
191. The radicle is the part destined to grow downwards 
189. Of what two parts may the seed-kernel consist? 
190. Describe the parts of the seed of bean. 
