36 Journal of Mycology [Vol.13 



hh. Pileus whitish to pale clay-color; in mush- 

 room and flower-beds C. intrusus Pk. 



gg. Gills and apex of stem violaceous at first, soon 



brownish C. lanatipes Pk. 



ggg. Gills and pileus drab-gray; viscid universal veil 



present C. sterilis Kauff. 



B. Cuticle of pileus not composed of gelatinous cells, hence 

 never viscid nor gelatinous. [Inoloma, Talamonia, Der- 

 mocybe, and Hydrocybe.] 

 a. Spores i2-i6;u, long 



b. Pileus rather large, squamulose ; whole plant dark vio- 

 laceous C. violaceus Fr. 



bb. Pileus small, chestnut color; stem white; spores i6x 



I i/n C. sericipes Pk. 



aa. Spores io-i2/x long 



b. Plants small, 2-4 cm. tall 



c. Pileus hygrophanous, glabrous, bay-red (moist) ; 



gills subochraceous C. hadiiis Pk. 



cc. Pileus not hygrophanous, densely fibrillose ; gills 



yellow C. aiircifoliiis Pk. 



bb. Plants larger 



c. Stem distinctly sheathed or ringed by the universal 

 veil 



d. Pileus tawny ; stem with cinnabar-colored, per- 

 sistent, concentric rings 



C. armillatus (Alb. & Schw.) 

 dd. Pileus purplish-brown, copper-brown, etc., to 

 drab ; stem peronate, i. e., sheathed with a uni- 

 versal veil C. torvus Fr. 



C. tonms nobilis Pk. 

 ddd. Pileus tinged yellow or rufous ; stem pero- 

 nate and annulate by a white universal veil . . . 



C. cane sc ens Pk. 

 cc. Stem not sheathed or ringed ; the universal veil 

 evanescent or absent 



d. Pileus hygrophanous, fibrillose-squamulose (like 

 C. palcaccus) 

 e. Pileus dingy chestnut (moist) ; stem long and slender. . 



C. gracilis Pk. 



ee. Pileus grayish ; stem stout and short, bulbous 



C. griseus Pk. 

 dd. Pileus not hygrophanous, merely silky or in- 

 nately fibrillose 

 e. Pileus reddish-gray, tinged purplish; gills purple or 

 violaceous; spores io-i2/t long, . . .C. pulchrifolius Pk. 



C. rubrocinereus Pk, 



