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THE Ci: REALS IN AMERICA 



A, an enlarged longitudinal section of maize. The internal structure is diagram nnatic inas- 

 much as about I 00 times the number of cells in outline (ten times in diameter) occur in 

 the gram. I and 2 show the pericarp; the testa is not shown in A, but is shown in B I 0. 

 The nucellus is wanting. 3, aleurone layer; 4, cells of the endosperm; 5, scutellum; 6, 

 plumule; 7, primary root; 8, its root-sheath; 9, a row of cells similar in appearance to 

 aleurone layer but smaller. B, section more highly magnified; shows pericarp composed 

 of two layers; I.epicarp; 2, endocarp. (The author.) 



