164 THE POLYPORAGEAE OF WISCONSIN. 



PLATE IV. 

 Trametes, Poria, Polystictus. 



-Trametes Peckii Kalchbrenner. Pores and section. On Populus del- 

 toides. Madison, September. 



-Trametes pini (Thore) Fr. a, surface of pileus; B, section. Star 

 Lake, August. 



-Poria crassa Karst. a, section showing strata. Hazelliurst, August. 



-Poria subacida Peck, a, young; 6, old. Pores and section showing 

 decay produced. Hazelhurst, August. 



-Poria attenuata Peck. Pores. Madison. 



-Polystictus concMfer Schw. a, young disks; 6, surface of mature 

 pileus; c, pores. On elm, Madison. 



-Polystictus velutinus Fr. Surface of pilel and pores. Crandon, Au- 

 gust. 



—Polystictus abietinus (Dicks.) Fr. Decay produced In hemlock. 

 (Tsuga canadensis). Hazelhurst, August. 



