THE SEED. 



43 



Fig. 57.-P, The plu- 

 mule; I, fragment of 

 wall of ovary ; w, root 

 with root-hairs above 

 and naked below. 

 (Sachs). 



Fig. 59. a, The caryopsis 

 of Sporobolus cryptandrus 

 within the glumes ; b, the 

 empty ovary split open; 

 c, the seed whioh has 

 escaped from the ovary. 

 (Sudworth). 



In case of most grasses, the caryopsis 

 consists of the seed permanently inclosed 

 in the adherent walls of the ovary. The 

 seeds of Sporobolus, when mature, freely 

 escape from the delicate ovary as shown in 

 Fig. 59. 



Fig. 58. Young plant with remains of 

 the kernel, part of root with lateral 

 roots starting, apex of main root re- 

 moved. (Sudworth). 



