452 



BOTANY. 



m 



Fio. 338. 



Fig. 332. Germination of Indian corn. /., //., ///., 

 successive stages. A and , front and side views of 

 a separated embryo. In the figures, w, the primary 

 root ; ws, its root-sheath ; tc', w", adventitious roots ; 

 w'", lateral roots springing from the main root ; e, 

 part of seed filled with endosperm ; so, cotyledon ; r, 

 its open margins ; k, the plumule ; 6, V, b", leaves of 

 young plant ; I. fragment of wall of ovary. Natural 

 eize. After Sachs. 



Fig. 333. Germination of the Date (Phoenix dacty- 

 lifera). /., transverse section of seed ; c, embryo ; , 

 endosperm. II., III., sections of germinating seeds; 

 c, apex of cotyledon developing into an absorbing or- 

 pan ; st, ftalk of cotyledon ; s, sheath of cotyledon ; 

 It', b", leaves ; w, root ; ID', lateral roots ; h, root-cap. 

 IV., young plant, natural size, the lettering as in ///. 

 A, section of IV. at x x; B, section at x y, the 

 lettering as in III. C, section at a e, the lettering as 

 in ///.After Sachs. 



