658 Proceedings of the Ohio State .Icadeiiiy of Science. 



C.- Stipe bulbous. 



D.^ Flesh violaceous, blue or bluish. 



E.^ Flesh and lamellae becoming purplish when 

 bruised ; pileus usually lo cm. or more 

 broad. vS. 902; H. 291; Mc. 311; St. 



2 :io C. purpurascens Fr. 



E.- Flesh and lamellae not changing color when 



bruised ; pileus less than 10 cm. broad. 



F.^ Pileus at first blue, becoming in part 



yellowish or tan; spores less than 12 



microns long, even. S. 902; H. 292; 



M. 178; Mc. 311; St. 2:9. 



C. coenilesccns Fr. 



F.^ Pileus yellow to tawny; spores more 



than 12 microns long, tuberculate. H. 



302 C. atkinsonianus Kauff. 



D.- Flesh white or whitish. 



E.^ Bulb of stipe marginate, depressed; lam- 

 ellae serrate ; stipe white. S. 902 ; M. 

 178; St. 2:9 ..C. calochroiis (Pers.) Fr. 

 E.^ Bulb not marginate ; lamellae entire ; stipe 

 yellowish. S. 892; H. 292; M. 178; Mc. 

 309; St. 2:4 ...C. varins (Schaeff.) Fr. 

 B.^ Stipe stuff"ed or hollow ; pileus yellow or olivaceous, 

 flesh paler ; lamellae whitish to pale cinnamon. H. 



291 C. olivaceo-stramineus Kaufif. 



A.- Pileus dry or moist only ; not viscid or glutinous. 

 B.^ Margin of pileus even. 

 C.^ Stipe solid. 



D.^ Plants (pileus or lamellae, or both,) some shade 

 of violaceous, purple or lilac, at least when 

 young. 

 E.^ Lamellae distant or subdistant. 



F.^ Stipe always distinctly bulbous ; whole 

 plant dark violet ; pileus with per- 

 sistent hairy scales. S. 924; H. 296; 

 M. 178; A. 161; Mc. 314; St. 2:23. 



C. violaceus (Linn.) Fr. 



