22 



THE TRUE GRASSES 



Fig li.—A, Longitudinal section through the ovary of Barley (after Johannsen, "Das 

 Endosperm derGerste"); m, micropyle; i'i, £«, outer and inner integuments; es, 

 embryo-sac. B, Fruit of Wheat from in front. C, The same from behind. 

 D, The same with the embryo uncovered; P. the pericarp thrown back: sc, 

 scutellum; E, embryonic bud and rootlet. E. The embryo by itself, highly mag- 

 nified: sc, scutellum; ep. epicotyl. F, The same in radial section. //, The same 

 seen from the side. J, Germinating wheat; c, the coleorhiza after being broken 

 through. 



