62 NEW YORK STATE MUSEUM 



Much decayed wood and prostrate trunks of hemlock trees in woods. 

 Adirondack mountains and Cattaraugus county. August and September. 



The plants are apt to assume darker colors in drying and as in several 

 other species the margin of the pileus becomes strongly involute. 



Collybia acervata Fr. 



Tufted Collybia. 



(Hym. Eur. p. 122. Syl. vol. v. p. 234.) 



Pileus fleshy but thin, convex or nearly plane, obtuse, glabrous, hy- 

 grophanous, pale tan-color or dingy pinkish-red and commonly striatulate 

 on the margin wlien moist, paler or whitish when dry ; lamellse narrow, 

 close, adnexed or free, whitish or tinged with flesh-color ; stem slender, 

 rigid, hollow, glabrous, reddish, reddish-brown or brown, often whitish at 

 the top, especially when young, commonly with a white mycelioid tomen- 

 tum at the base; spores elliptical, .00024 inch long, .00012 to .00016 

 broad. 



Plant casspitose ; pileus i to 2 inches broad; stem 2 to 3 inches 

 long, about i line thick. 



Decaying wood and ground among fallen leaves in woods. Adiron- 

 dack mountains. August and September. 



The American plant is rather smaller than the European, but in other 

 respects it agrees well with the description of the species. I have seen 

 no specimens with the pileus more than two inches broad. The stems, , 

 though rigid, are easily broken. Agaricus simillimus, Rep. 24, p. 62, is 

 merely a form of this species. 



Collybia spinulifera Pk. 



Spinule-bearing Collybia. 

 (Rep. 24, p. 62.) 



Pileus fleshy, thin, convex or nearly plane, glabrous, hygrophanous, 

 reddish tan-color tinged with pink and slightly striatulate on the margin ' 

 when moist, paler when dry, adorned with minute colored spinules or setae; 

 lamellae narrow, close, rounded behind and free, pale cinnamon-color, 

 becoming somewhat darker with age, spinuliferous ; stem slender, tough, 

 glabrous, shining, hollow, reddish-brown, often paler or whitish at the top, 

 especially in young plants, with a whitish mycelioid tomentum at the 

 base; spores elliptical or nearly so, .00024 to .0003 inch long, .00016 

 broad. 



Plant caespitose; pileus 8 to 16 lines broad; stem 2 to 3 inches long, 

 about I line thick. 



