The Agaricaceae of Ohio. 567 



P. rhodophaea Mont. (S. 1050; J. M. 13: 249), P. pulicosa 

 Mont. (S. 1056; T. ^I. 13: 249), and P. sullivantii Mont. (S. 

 1047; J- ^^- 14- 69) have not been recognized since 1856. 



PSATHYRA FR. 



A.^ Plant not violaceous. 



B.^ Pileus umbonate. S. 1069; J. M. 13: 152, 



F. subnuda Karst. 

 B.^ Pileus not umbonate. 



C.^ Pileus striate ; stipe arising from mycelial bulb ; 

 growing in sand. J. M. 13: 152. 



P. miamensis Morg. 



C.^ Pileus even ; stipe nearly equal ; not growing in 



sand. S. 16: 126; J. M. 13: 152; B. T. 26: 68. 



P. microsperma Peck 

 A.- Whole plant violaceous. S. 1063; J. M. 13: 151. 



P. pholidota Mont. 

 COPRINUS FR. 



A.^ Lamellae crowded; substance of pileus rather thick and 

 fleshy ; pileus often striate but not plicate. 

 B.^ Pileus scaly or floccose-villous or nearly glabrous, not 

 atomate or mealy. 

 C.^ Scales of pileus small or medium, formed by break- 

 ing up of surface of pileus. 

 D.^ Pileus at first cylindrical; white, shaggy; stipe 

 annulate. S. 1079; St. 348; Mc. 370; H. 332; 



A. 33-40 ; M. 173 C. comaUis Fr. 



D.- Pileus at first ovoid. 



E.^ Pileus cinerous, scales reddish-brown ; stipe 

 with similar scales, annulate. S. 1081 ; M. 



173 ; pi. 8 C. squaiiiosus ATorg. 



E.- Scales of pileus not reddish-brown; stipe not 

 scaly. 

 F.^ Plants growing on fallen trunks or 

 stumps : pileus grayish-brown. S. 

 1083; 'M. 174; St. 350; Mc. 374. 



C. fusccsccns TSchaeflf.) Fr. 



