252 



BOTANY. 



the radicle, for it is not a little root) ends in a very short 

 root which is continuous with the stem. 



530. Under the proper conditions of heat and moisture, 

 the root elongates, and pushes out through the pore (micro- 



FlQ. lil. 



Fig. 140. — Windsor Beau (Vicia faba). A, seed with one cotyledon removed ; 

 c, cotyledon; fcn, plumule; «), root; s, seed-coat B, germmating seed ; s, seed- 

 coat, partly torn away at Z; st, stalk of one of the cotyledons; A;, curved stem 

 above, and Ac, short stem below, the cotyledons; h, ws, root. 



Fig. 141. — Castor-oil Plant (Ricinus communis). J, longitudinal section of the 

 ripe seed. J/, germinating; seed with the cotyledons still inside of the seed-c-jat 

 (shown more distinctly in A and Bj, s, seed-coat; e, endosperm; c, cotyledon; 

 hCy stem; w, root. 



pyle) of the seed-coat; at the same time the stalks of the 

 cotyledons elongate and thus bring the plumule outside of 

 the seed-coat, the cotyledons alone remaining within. Dur- 

 ing the first few days of its growth the young plant is 



