34 Journal of Mycology [Vol. 13 



aa. Pileus not coarsely corrugate 



b. Surface of pileus or flesh distinctly bitter 

 c. Pileus yellow 



d. Glutinous when young, very bitter ; stem white. 



C. amarus Fk. 



C. vibratilis Fr. 



dd. Not glutinous; stem and gills citron yellow; 



flesh rather bitter; spores 14-17 -"^ 7-9/* 



C. turbinoides sp. nov. 

 cc Pileus dark olivaceous to fuliginous, surface bit- 

 ^gj. C. infractus Fr. 



bb. Taste not distinctly bitter 



c. Spores large, 9-16/A long 



d. Stem short, siibequal or niargmate-bulbous; spores 



p-i2ix long. 

 e Pileus heliotrope-purple; gills close, narrow and 



concolor; plant medium size. . .C. hehotropicus Pk. 

 ee. Pileus some shade of yellow or greenish 

 f Gills whitish at first; pileus tinged greenish; stem not 



bulbous C". olivaceo-stramineus Katifr. 



fif. Gills yellow to yellowish at first ; stem marginate-bul- 

 bous 

 g. Bulb top-shaped; gills entire; flesh white. .C. turbinatus Fr. 

 gg Bulb truncate below; gills eroded, flesh yellow; whole 



plant citron-yellow C. sulfunnus Quel. 



eee. Pileus whitish, no greenish tinge 

 f. Stem marginate-bulbous ; plant whitish throughout 



C. albidus Pk. 

 ff . Stem equal or subequal ; pileus whitish or tinged red, 



C. communis Pk. 

 dd. Stem long and bulbous; gills and stem violaceous 

 at first 



e. Spores 10-12.5/* long; pileus pale brown; on 



sphagnum C. sphagnophilus Pk. 



ee. Spores 13-16/A long; pileus yellow ; in woods 



C. Atkinsonianus Kauif. 

 ddd. Stem not bulbous, long and cylindrical, plant 



more or less glutinous 



e Stem with evanescent, patch-like scales 



f . Gills pallid at first C elatior pallidif alius Pk. 



IT. Gills violaceous at first C cylindripes Kauff. 



ee. Stem with broken, concentric rings of floccose scales, 



usually somewhat narrowed at base C. collinitus. Fr. 



cc. Spores smaller, 6-9/x long 



d. Pileus olivaceous; stem bulbous 



