164 THE POLYPORACEAE OF WISCONSIN. 



PLATE IV. 

 Trametes, Poria, Polystictus. 



Fig. 15. Trametes Peckii Kalchbrenner. Pores and section. On Populus del- 

 toides. Madison, September. 



Fig. 16. Trametes pini (Thore) Fr. a, surface of pileus; &, section. Star 

 Lake, August. 



Fig. 17. Poria crassa Karst. a, section showing strata. Hazelhurst, August. 



Fig. 18. Poria subacida Peck, a, young; Z>, old. Pores and section showing 

 decay produced. Hazelhurst, August. 



Fig. 19. Poria attenuata Peck. Pores. Madison. 



Fig. 20. Polystictus conchifer Schw. a, young disks; ft, surface of mature 

 pileus; c, pores. On elm, Madison. 



Fig. 21. Polystictus velutinus Fr. Surface of pilei and pores. Crandon, Au- 

 gust. 



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

 (Tsuga canadensis). Hazelhurst, August. 



