54 - NEW YORK STATE MUSEUM 



of Mycena, but the tough substance and incurved margin of the young 

 pileus connect it more closely with CoUybia. 



Collybia conigena Pers. 



Fir cone Collybia. 



(Hym. Eur. p. ii8. Syl. vol. v. p. 223.) 



Pileus thin, rather firm, convex, nearly plane or slightly depressed in 

 the center, somewhat umbonate, glabrous, yellowish or brick-red, becom- 

 ing pale, the thin margin slightly striate when moist; lamellae narrow, 

 crowded, adnexed or free, pallid; stem slender, tough, minutely hollow, 

 covered with a minute flocculent pulverulence, especially when young, 

 pallid, terminating in a strigose radicating base; spores minute, eUiptical, 

 .00012 to .00016 inch long, .00008 to .0001 broad. 



Pileus 4 to 10 lines broad; stem i to 1.5 inch long, scarcely more than 

 half a line thick. 



Fallen pine cones. Albany and Lewis counties. September and 

 October. 



Our forms seem to be rather smaller than the typical European plant. 



Coilybia albipilata n. sp. ^ 



White-haired Collybia. 



{Agaricus coiiigenoicles Ellis Rep. 30, p. 39.) 



Pileus thin, convex or nearly plane, sometimes slightly depressed in the 

 center, most minutely pubescent with short hyaline or whitish hairs, 

 brown; lamellae rather broad, rather close, adnexed, minutely hairy on the 

 edge, white ; stem slender, hollow, pallid, adorned with a thin pulverulent 

 pubescence of somewhat scattered whitish hairs, terminating in a fibrillose 

 radicating base; spores minute, elliptical, .00016 to .0002 inch long, .0001 

 to .00012 broad. 



Pileus 4 to 6 lines broad; stem i to 2 inches long, scarcely half a line 

 thick. 



Buried pine cones. Albany county. October. 



This species differs from C. conigenoides, to which it was formerly referred, 

 in its darker pileus, its larger size and in the char;icter of the hairs on the 

 edge of the lamellae. These are not elliptical as in that species, but grad- 

 ually tapering toward the apex which sometimes ends in a knob or abrupt 

 enlargement. Neither can it be the same as C. semihcerens, for the pileus 

 is not glabrous nor the stem solid and dark brown as in that species. The 

 pubescence in our plant is so thin and minute that it may be easily over- 

 looked. It requires a considerable magnification to see it clearly. 



