COLLYBIA. 143 



tawny-brown, not becoming pale; gills adnexed, densely 

 crowded, arcuate, linear, bright sulphur-yellow stem about 

 1 in. long, 1 line thick, incurved, clear sulphur-yellow, 

 hollow. 



Agaricus (Collybia) exsculptus, Fries, Epicr., p. 93 ; Cke., 

 Hdbk., p. 71 ; Cke., Illustr., pi. 268A. 



On dead wood, &c. 



Distinguished from allied species by its toughness, and 

 the sulphur-yellow colour of the gills and stem. 



Entire fungus very dry and tough. This species and 

 C. aquosa may almost be considered as the two opposite 

 extremes of C. dryophlla. (Fries.) 



Collybia macilenta. Fr. 



Pileus about 1 in. across, flesh thin, yellow; convex then 

 flattened, obtuse, orbiculate, even, glabrous, quite dry, dark 

 yellow; gills soon separating from the stem and becoming 

 free, closely crowded, narrow, linear, very unequal, pure 

 yellow ; stem about 1|- in. long, not 1 line thick, equal, not 

 straight but usually wavy throughout, naked, glabrous, 

 bright yellow, indistinctly hollow, tough, cartilaginous, base- 

 slightly rooting ; spores elliptical, 5-6 X 3 p.. 



Agaricus (Coilybia) macilentus, Fries, Epicr., p. 93; Cke., 

 Hdbk., p. 71 ; Cke., Illustr., pi. 268s. 



In pine woods on leaves, &c. 



Agreeing in size with C. esculenta, but readily known 

 from this and every other species by the yellow colour of 

 every part. 



Collybia clavus. Linn. 



Pileus 1-4 lines across, flesh very thin, conically-convex 

 then plane, somewhat papillate, glabrous, shining, orange- 

 scarlet, disc often darker, margin slightly striate ; gills 

 adnexed, ventricose, rather broad, somewhat crowded but 

 not numerous, white, rarely with a yellow tinge ; stem up 

 to 1 in, long, very slender, naked glabrous, whitish, base 

 downy ; spores pip-shaped, 4 X 2 5 /*. 



Agaricus clavus, Linn., PL Suec., n. 1212; Cke., Hdbk., 

 p. 71 ; Cke., Illustr., pi. 147A. 



On twigs, &c. 



The smallest species in the genus, distinguished by the 



