642 Proceedings of tlic Ohio State Academy of Scieii 



L C 



C.- Stipe eccentric ; pileus 3 cm. or more broad. 



D.^ Pileus strigose, depressed to infitndibuliform. 

 rufescent-tan, purplish when young; stipe 

 hirsute. S. 616; H. 224; A. 135. 



P. rudis Fr. 

 D.'-^ Pileus becoming scaly, conchate, cinnamon or 

 paler; stipe pubescent at the base. S. 615; 

 H. 223; M. 196; Mc. 232. 



P. conchatus Fr. 

 A.- Pileus glabrous. 



B.^ Lamellae decurrent or sub-decurrent. 



C.^ Stipe lateral ; pileus striate on the margin, less than 



3 cm. broad. AI. 197 P. dcalbatus Berk. 



C~ Stipe eccentric ; pileus usually more than 5 cm. broad, 

 margin not striate. 

 D.^ Stipe solid, pubescent or tomentose. 



E.^ Pileus cinnamon to paler; stipe pubescent at 

 the base. S. 615; H. 223; M. 196; Mc. 

 232 P. coiicliatns Fr. 



E.- Pileus flesh-colored to violaceous; stipe with 

 gray or violaceous down. S. 615 ; H. 225 ; 

 Mc. 233 P. torulosus Fr. 



D.- Stipe spongy-stuffed, glabrous. S. 617. 



P. robinsonii B. & Mont. 

 B.- Lamellae free. S. 620 P. sullivaiitii Mont. 



Notes. 



Berkeley's description of P. angustatus agrees well with the 

 plant we know as Pleurotus petaloides Fr. Berkeley says : "Lea 

 describes it as tough when fresh, and it is therefore placed in the 

 genus Panus." 



The plants now known as P. rudis have been reported also 

 as Lentinus strigosus Fr., and Lentinus lecomtei Fr. 



Neither P. robinsonii nor P. sullivantii have been identified 

 since Sullivant's time. 



