94 



OBJECT LESSONS IN BOTANY. 



189. As to the seed-kernel, 

 it may consist of two parts, 

 namely, the germ and albu- 

 num, or it may be all germ. 



190. In the Bean (Fig. 311) 

 it is all germ. A better name 

 for the germ is emhryo. Now 

 in all seeds, the embryo is, in 

 fact, a miniatm-e plant, consist- 

 ing of three parts, viz., radi- 



d^lo ^-^l,,n^..l^ .411 T ^^9- Sll- Seed of Beau, without its 



Cie, plumule,^ cotyledons. In .tell: c, c are the two cotyledons; ., the 



this Bean, r is the radicle, 2^ radicle; ^, the plumule. 



is tlie plumule, C, C, are the ^^^-'^^2. Seedof Wheat.cutopen: ais 

 , ^ ^ the albumen; c, the one cotvledon ; v-> 



cotyledons. pkmaule; r, radicle. 



Fig. 313. 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 cotyledons, lyingr in albumen. 



Fig. 316 Seed of Onion. Fig. 317. Section of the same, showing the coiled em- 

 bryo, one cotyledon, in albumen. 



191. Tlie 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 bran. 



