94 



OBJECT LESSONS IN BOTANY. 



189. As to the seed-kernel, 

 it may consist of two parts, 

 namely, the germ and aXbvr 

 men, 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- 

 cle, plumule, cotyledons. In _ 



'this Bean, r is the radicle,^ radicle ; ^, the plumule 



+■[,„ /'as'. 312. Seed of Wheat, out open: 

 the albusnen; c, the one cotyledon; 

 plumule; )■, radicle. ^g 



814 815 . 816 817 /^\ 813 



is the plumule, c, c, 

 cotyledons. 



are 



811 812 



Fig. Sll. Seed of Beau, without its 

 sh'ell: c, c are the two cotyledons; )•, the 



a 13 



Fig: 313. Seed of Four- o'clock; embryo two-cotyledoned, coiled; a, albumen. 



Fig. 814.^ Seed of Heather. Fig. 315. A section of the same, showing the curved 

 embryo, with two cotyledous, lying in albumen. 



Fig. 816. Seed of Onion. Fi^. 317. Section ef 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. 



