THE WHITE-SPORED AGARICS 



35 



Amanita mappa. Fr. 

 The Delicate; Amanita. Poisonous. 



Mappa means a napkin, so called from the volva. The pileus is two to three 

 inches broad, convex, then expanded, plane, obtuse or depressed, without separ- 

 able cuticle ; margin nearly even ; white or yellowish, usually with patches of 

 the volva dry. 



The gills are adnexed, close, narrow, shining, white. 



The stem is two to three inches long, stuffed, then hollow, cylindrical, nearly 

 smooth, bulbous, nearly globose at the base, white, almost equal above the bulb. 



The volva with its free margin is acute and narrow. The ring is mem- 

 branaceous, superior, soft, lax, ragged. 



Its color is quite as variable and its habits are much like A. phalloides, from 

 which it can only be distinguished by its less developed volva, which, instead of 

 being cup-shaped, is little more than a mere rim fringing the bulb. The odor at 

 times is very strong. It is found in open woods and under brush. Label it 

 poisonous. 



Fic.urE 24. Amanita mappa. Natural size, showing long smooth stem, cap 

 yellowish-white and ring. 



