514 Proceedings of the Ohio State Academy of Science. 



C.- Lamellae not long decurrent; (sometimes uncinate or 

 subdecurrent). 

 D/ Pileus viscid when moist; stipe with minute 

 blackish tomentum. S. 363; M. 80; Mc. 145; 

 A. 109; St. 1/5; P. R. 39:62 



P. serotinus Schrad. 

 D.^ Pileus and stipe not as above. 



E.^ Lamellae broad, sinuate; pileus glabrous; 

 stipe thick, sohd. S. 341; P. R. 39:60; 

 H. 157; M. 78; ^Ic. 138; A. 102; St. 167. 



P. ulmarius Bull. 

 E.^ Lamellae rather narrow, adnate to subdecur- 

 rent. 

 F.^ Pileus grayish to brownish, glabrous; 

 stipe sohd. S. 343; M. 78; St. 169. 



P. craspedius Fr. 

 F.- Pileus white, pruinate or floccose; stipe 

 stuffed or hollow. 

 G.^ Lamellae adnate to emarginate ; stipe 

 subvillous ; pileus somewhat irreg- 

 ular. S. 344; St. 170; M. 78; P. 

 R. 39 : 60 ; Mc. 140. 



P. lignatilis Fr. 

 G.^ Lamellae adnate to subdecurrent; 

 stipe glabrous, pileus orbicular. S. 

 344; H. 163; Mc. 140; St. 171. 



P. circinatus Fr. 

 B.^ Stipe wanting; pileus definitely sessile or resupinate. 



C.^ Pileus less than 8 mm. broad, cup-shaped when 

 young, gray, bluish-gray or nearly black. S. 379 ; 



H. 161 ; A. 109; St. 180 P. applicatus Batsch 



C.^ Pileus usually 2 cm. or more broad. 

 D.^ Pileus glabrous or nearly so. 



E.^ Lamellae very narrow ; pileus somewhat 



spatulate, not viscid when moist. S. 361 ; 



■ P. R. 39:64; H. 157; Mc. 144; St. 174, 



A. 107 P. petaloides Fr. 



