Plate 68. — Seed Structure. 



A. Transverse Section, Wheat. F. Pericarp 

 2. Mesocarp. 3. Endocarp. E. Seed Tissues. 4. 

 perisperm layer. 4. Endosperm, aleurone layer 

 containing starch. 



B. Powdered Wheat. 1. Epicarp tissue. 

 tissue. 4. Aleurone cells of the endosperm, 

 carp. 6. Starch. 



208 



or fruit layers. 1. Epicarp. 



Seed coats consolidated with 



6. Endosperm, parenchyma 



2. Perisperm tissue. 3. Seed coat 

 5. Unicellular trichome from epi- 



