514 Proceedings of the Ohio State Academy of Science. 



Cr 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. 173: I'- R- 39 ••62 



F. serotinus Schrad. 



D.- Pileus and stipe not as above. 



E.^ Lamellae broad, sinuate; pileus glabrous; 

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

 H. 157; M. 78; Mc' 138; A. 102; St. 167. 



P. uUnarius 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 ; j^leus 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. 17T. 



P. circinatus Fr. 

 B.2 Stipe wanting; pileus definitely sessile or resupinate. 



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

 young, grav. 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; ^k. 144; St. 174, 

 A. 107 P. petaloides Fr. 



