520 Proceedings of the Ohio Stin'e Acadcuiy of Science. 



F. 176; H. 165; Ale. 168; A. 120; 

 M. 183; St. 2: 102; P. R. 38: 125. 

 L. piper ata (Scop.) Fr. 

 G.' Flesh thin ; lamellae adnate, becoming 

 straw-colored, i mm. broad; stipe 

 stuffed ; latex often drying sulfur- 

 yellow. S. 436; H. 166; N. A. F. 

 176; Mc. 167; M. 183; St. 2: 101. 

 L. pergamena (Sw.) Fr. 

 E.- Pileus dark colored. 



F.^ Pileus olivaceous ; azonate, scabrous- 

 hairy ; lamellae close, narrow, staining 

 green. S. 9:56; H. 175; N. A. F. 

 178; P. R. 42: 23. .L. atroviridis Peck 

 F.- Pileus grayish to brown, or with lurid 

 tints, somewhat zoned, glabrous : lam- 

 ellae subdistant. rather broad, not 

 staining green. S. 432; St. 2:100; 

 N. A. F. 178; P. R. 38: 128. 



L. pyrogala Fr. 

 L. rusticana (Scop.) Burl. 

 C.- Pileus viscid. 



D.^ Plants becoming blackish in age or with injury ; 

 stipe viscid when moist. S. 426; St. 2:94; 

 X. A. F. T83; P. R. 38: 120. 



L. turpis (W^einm.) Fr. 

 D.- Plants not becoming blackish. 



E.^ Margin of pileus woolly or tomentose. at least 

 in young plants. 

 F.^ Stipe scrobiculate-pitted ; latex becoming 

 yellow ; margin often mked at matur- 

 ity. S. 424; TT. 169-170: M. 182; St. 

 2:93; N. A. F. 179; P. R. 38: 118. 



L. scrohiculata (Scop.) Fr. 

 F.- Stipe not pitted : latex unchanging. 



G.^ Center of pileus glabrous, usually 

 zonate. S. 424: X. A. F. ^j^: H. 



