516 Proceedings of the Ohio State Academy of Science. 



P. corticatus is very close to P. dryinus Pers. It should 

 probably be regarded as a variety of the latter as Atkinson does. 



HYGROPHORUS FR. 



A.^ Plants becoming black when bruised or dried; pileus conic; 

 red, orange or yellow or with these colors blended. S. 

 418; St. 2:89; Mc. 160; H. 209; M. 181; M. B. 116:62. 



H. c aniens (Scop.) Fr. 

 A.- Plants not becoming black. 

 B.^ Stipe solid. 



C Pileus and stipe glutinous. 



D.^ Stipe punctate or scabrous at top with small 

 scales. 



E.' Pileus pale brownish or reddish brown to 

 whitish, center usually darker. S. 388; 

 AI. B. 116:48; H. 213; Ale. 716; AI. 180. 



H. laiirae Morg. 



E.- \Miole plant white; (the stipe usually 



stuffed or becoming hollow). S. 388; M, 



B. 116:47; St. 2:71; H. 206; Mc. 149; 



A. Ill ; AI. 180. 



H. eburneus (Bull.) Fr. 

 D.- Stipe not punctate or scabrous. 



E.' Pileus white, yellow or reddish-yellow in the 

 center. S. 398; H. 210; Ale. 157; Al. B. 



116: 50 H. Havodiscus Frost 



E.- Pileus grayish-brown or smoky-brown, often 

 darker in the center. S. 398; H. 212; 

 Ale. 158; A. 113; AI. B. 116:52. 



H. fnliginosus Frost 

 C.~ Pileus and stipe not glutinous ; pileus may be viscid 

 or moist only. 



D.' Lamellae distant or subdistant; pileus convexo- 

 plane or somewhat depressed. 



