LIFE HISTORIES OF FUNGI 277 



(Fig. 200), resembles Agaricus superficially and is often 

 mistaken for it. Amanita always has, at the base of the 

 stalk, a cup, which Agaricus lacks. 

 269. Description. — The body of Agaricus consists of a 



Fig. 200. — The deadly amanita, Amanita phalloides. Note the cup at 

 the base of the stipe. (Photo by E. M. Kittredge.) 



short fleshy stalk (the stipe), having numerous root-like 

 hyphae (rhizomorphs) penetrating the soil from its lower 

 end, and bearing at its upper end an umbrella-shaped 

 expansion, the pileus. On the under side of the pileus are 

 numerous thin lamellae or gills. The stalk and pileus are 



