7<i STUDIES OF AMERICAN FUNGI. 



are A. nivalis Grev., an entirely white plant regarded by some as 

 only a white form of A. vaginata. Another white plant is A. volvata 

 Pk., which has elliptical spores, and is striate on the margin instead 

 of sulcate. 



Amanitopsis farinosa Schw. The mealy agaric, or powdery ama- 

 nita, is a pretty little species. It was first collected and described 

 from North Carolina by de Schweinitz (Synop. fung. Car. No. 552, 

 1822), and the specimens illustrated in Fig. 78 were collected by me 

 at Blowing Rock, N. C., during September, 1899. Peck has given 

 in the 33rd Report N. Y. State Mus., p. 49, an excellent description 



FIGURE 78. Amanitopsis farinosa. Cap grayish (natural size). Copyright. 



of the plant, though it often exceeds somewhat the height given by 

 him. It ranges from 5-8 or 10 cm. high, the cap from 2-3 cm. broad, 

 and the stem 3-6 mm. in thickness. 



The pileus is from subglobose to convex and expanded, becoming 

 nearly plane or even depressed by the elevation of the margin in old 

 specimens. The color is gray or grayish brown, or mouse colored. 

 The pileus is thin, and deeply striate on the margin, covered with a 

 grayish floccose, powdery or mealy substance, the remnant of the 

 evanescent volva. This substance is denser at the center and is 

 easily rubbed off. The gills are white and free from the stem. The 



