SEEDS. 



PLATE LV. 



FIG. 65.- Powdered Linseed (x 240). 



alb, Endosperm with aleurone grains and fixed oil. 



cm, Mucilaginous epidermis. 



co, Central portion of cotyledon. 



c'o', Epidermis of same with subjacent layer of cells. 



h, Hyaline layer. 



p, Parenchymatous layer. 



so, Sclerenchymatous layer, surface view. 



s'c'j The same in section. 



SP, The three foregoing layers united, as they usually occur in the 

 powder. 



tc, Pigment layer. 



