164 THE POLYPORACEAE OF WISCONSIN. 



PLATE IV. 

 Trametes, Porta, Polystictus. 



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

 toides. Madison, September. 



-Trametes pini (Thore) Fr. a, surface of pileus; 6, section. Star 

 Lake, August. 



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



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

 decay produced. Hazelhurst, August. 



-Poria attenuata Peck. Pores. Madison. 



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

 pileus; c, pores. On elm, Madison. 



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

 gust. 

 Fig. 22. — Polystictus abietinus (Dicks.) Fr. Decay produced in hemlock. 

 (Tsuga canadensis). Hazelhurst, August. 



