THE FUNGI WHICH CAUSE PLANT DISEASE 



453 



annulus none; volva present. Easily distinguished from all otlier 

 pink-spored genera by the volva. Fig. 322. 

 About thirtj'-six species. 



Fig. 321. — Pholiota adiposa. After Clements. 



V. bombycina (Scha.) Quel. 



Cap large, 8-25 cm. wide, all white and silky, more rarelj' some- 

 what scaly, hemispheric or bell-shaped to convex; stem 8-12 cm. 

 by 1-2 cm., white, smooth, tapering upward, solid, volva large 

 and spreading; gills free, salmon-pink, crowded, spores elliptic, 

 6-7 X 4 ^. It is often parasitic on various trees. 



