-520 Proceedings of the Ohio Staie .Icadeiiiy of Science. 



F. 17O: |[. 165; Ale. 168; A. 120; 

 AI. 1S3; St. 2: 102; P. R. 38: 125. 

 L. piperata (Scop.) Fr. 

 G.- Flesh tliin ; lamellae adnate. becoming 

 straw-colored, i mm. l)road; stipe 

 stuffed ; latex often drying sulfur- 

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

 176; Me. 167; AI. 183; St. 2: loi. 

 L. pcrganicna (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 suljdistant. rather broad, not 

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

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



L. pyrogahi Fr. 

 L. nisficana i Scop.) Burl. 

 C.- Pileus viscid. 



D.' Plants l)ecoming l)lackish in age or with injury; 

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

 X. A. F. 183; P. R. T,^: T20. 



L. turpis ( W'einm.) Fr. 

 D.- Plants not becoming blackish. 



E.^ iNfargin of pileus woolly or tomentosc. at least 

 in young plants. 

 F.^ Stipe scrobiculate-pitted ; late.x becoming 

 yellow; margin often n?ked at matur- 

 ity. S. 424: IF ir)9-i7o; AT. 182; St. 

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



L. scrobicnhifa (Scop.) Fr. 

 F.- Stipe not ])itted ; latex unchanging. 



G.' Center of ]jileus glabrous, usually 

 zonate. S. 424; X. A. F. 178; H. 



