PLATE 12 
Agaricus tabularis: 
A, B.—Two fruiting bodies showing smooth and nearly smooth pileus. Greatest 
diameter, n cm. Akron, Colo., 1915. 
C, D.—Two fruiting bodies showing the rough or tabular structure of the pileus. 
Greatest diameter, 9.5 cm. Akton, Colo., 1915. 
