512 Proceedings of the Ohio State Academy of Science. 



Cr Lamellae narrow ; plants on wood, white. S. 337 ; 



St. 164; M. yy 0. intcgrcUa Pers. 



B.- Pilens nmbilicate or infundibuliform. 



C} Pileus silicate, yellowish or fading. S. 315; St. 1561 



H. 132 0. cacspitosa Bolt. 



C.- Pileus even or striatulate only. 



D.^ Pileus sooty-gray or reddish-brown, usually silky 

 or flocculose or becoming so. 

 E.^ Pilei usually less than i cm. broad ; plants on 

 ground. S. 316; St. 156; M. 76. 



0. nistica Fr. 



E.- Pilei usually more than i cm. broad ; plant.> 



on wood. S. 314; H. 130; M. 76; A. 101 ; 



P. R. 45 : 37 0. cpichysinm Fr. 



D.- Pileus not as above. 



E.' Pileus yellow to orange or paler, 4-10 mm. 

 broad ; stipe 2-5 cm. long. S. 331 ; St. 163 ; 

 P. R. 45:40; H. 134; M. yy. 



O. fibula Bull. 



E.- Pileus reddish-brown or grayish-red. 8-25 



mm. broad. 



F.' Lamellae pallid; stipe reddish-brown. 6- 



T2 mm. long. S. 321; St. 158; ^L 



76 O. muralis Sow. 



F.- Lamellae flesh color, grayish-red, or pale 

 yellow; stipe pallid to rufescent. usu- 

 ally longer. S. 313; .St. 154; H. 133;. 

 P. R. 45 : 36 O. pyxidata Bull, 



Notes. 



O. alboflava is closely related to O. chrysophylla and is ])rob- 

 ably a variety of the latter. ' The plants figured by Hard (p. 135, 

 f. too) as O. alboflava agree more closely with the description of 

 O. chrysophylla. 



O. chrysea Peck, reported by Morgan (p. 75). is now re- 

 garded by its author as a variety of O. chrysophylla. 



O. rhyssospora Mont, and O. strombodes B. & Alont.. de- 



