MYCOLOGIA 



Vol. IV September, 1912 No. 5 



THE AGARICACEAE OF THE PACIFIC 

 COAST— II 



\ William A. Murrill 



The present article deals with two series of gill-fungi, those 

 with hyaline spores and those with ochraceoiis or ferruginous 

 spores. 



Series i. Spores Hyaline 

 Species belonging to the genera ordinarily known as Lepiota, 

 Amanitopsis, and Amanita are considered in this series. Some 

 of these names, unfortunately, can no longer be used, but in the 

 most important one, Amanita, the new name suggests the deadly 

 nature of many of the species and should prevent any serious 

 mistakes. 



Annulus alone present, i. Lepiota. 



Volva alone present. 2. Vaginata. 



Volva and annulus both present. ■ 3. Venenarius. 



I. Lepiota (P. Browne) S. F. Gray, Nat. Arr. Brit. PI. i: 6oi. 



1821 



I. Lepiota subnivosa sp. nov. 



Pileus thin, convex to plane, umbonate, solitary, 1.5-3 cm. 

 broad; surface dry, smooth, somewhat striate at times, slightly 

 innate-fibrillose, with a few scattered floccose scales, snow-white 

 throughout or rose-tinted on the umbo ; lamellae free, narrow, 

 not crowded, white; spores ellipsoid, smooth, hyaline, uniguttu- 

 late, 7-8X3-5/>i; stipe thicker below, slender, glabrous, hollow, 

 white, 5-9 cm. long and 2-4 mm. thick ; annulus superior, white, 



[Mycologia for July, 1912 (4: 163-230), was issued July 13, 1912.] 



231 



