512 Proceedings of the Ohio State Academy of Science. 



C.- Lamellae narrow; ])lants on wood, white. S. 337; 



St. 164; AJ. yy \.0. intif/rella I'ers. 



B.- 1 'ileus umbilicate or infimdibuliform. 



C.^ Pileus sulcate. yellowish or fading. S. 315: St. 156; 



II. 132 0. caesfifosa Bolt. 



C.- Pileus even or striatulate only. 



D.' 1 'ileus sooty-gray or reddish-brown, usually silky 

 or flocculose or becoming so. 

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

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



0. nistica Fr. 



E.- I'ilei usually more than i cm. broad; plants 



on wood. S. 314; H. 130; 'SI. 76; A. loi ; 



P. R. 45 : 37 O. efichysiiini 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. 77. 



0. fibula Bull. 



E.- T'ileus reddish-brown or grayish-red, 8-25 



mm. broad. 



F.^ Eamellae pallid ; stipe reddish-brown, 6- 



12 mm. long. S. 321; St. 158; M. 



76 0. innralis Sow. 



F.- Lamellae flesh color, gravish-red. or paie 

 yellow; stipe pallid to rufescent. usu- 

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

 P. R. 45 : 36. . . 0. py.vidata Bull. 



Notes. 



O. alboflava is closely related to O. chrvso])lnlla and is jirob- 

 al)ly a variety of the latter. The plants figured bv Hard (p. 135, 

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

 O. chrysophylla. 



O. chrysea l^eck, reported by Morgan (yi. 75), is now re- 

 garded l)y its author as a variety of O. chrvsophylla. 



O. rhyssospora Mont, and O. strombodes B. & Mont., rle- 



