THE POLYPORACEAE OF WISCONSIN. 89 



measured about 5 cm. in width, 4 cm. in length and 5 mm. in thickness. 

 The tubes are rarely more than 2 to 6 mm. in length. 



P. adustus is closely related to P. fumosus and P. fragrans Pk. It 

 is thinner than P. fumosus, and darkens more. P. fragrans is dis- 

 tinguished by its odor, and its hymenium does not blacken. 



Syn. : Bjerkandera adusta (Willd.) Karst. ; 19, 32, p. 634. 

 Myriadoporus adustus Peck; 19, 11 p. 27. 



Polyporus fumosus (Pers.) Pr. 



Pileus fleshy, corky, azonate, sericeous, becoming glabrate, sooty, pal- 

 lid, dilate-adnate behind, within fibrous, subzonate ; pores small, short, 

 round, entire, whitish-smoky, becoming darker when rubbed. 



This species has not been found abundantly in the state. Two speci- 

 mens were found in November 1899, at Madison, growing on the trunk 

 of a living locust tree. A specimen was found at Star Lake, and sev- 

 eral small ones were found at Bangor growing on old logs. The largest 

 one is about 6 cm. wide, 3.5 cm. long, and from 1 to 1.5 cm. thick. 



The pilei are imbricated and effused behind ; soft and fleshy when 

 fresh but become corky when dry. When young the pileus is some- 

 what corky but it soon becomes glabrate. The hymenium is thinner 

 than in P. adustus, white-pruinose, but does not turn as dark when 

 bruised. The pores are very small and obtuse, scarcely ever more than 

 2 mm. in length. As in P. adustus, there is always a wide sterile band 

 at the margin. 



The species may be distinguished from P. adustus by the thicker pi- 

 leus and the lighter colored hymenium. 



Syn.: Bjerkandera fumosa (Pers.) Karst.; 19, 32, p. 635. 



Polyporus fragrans Peck. 



Fragrant ; pileus flesy-tough, effuso-reflexed, imbricating, 2.5 to 5 cm. 

 high, 5 to 10 cm. broad, rather thin but sometimes thickened be- 

 hind, velvety to the touch and clothed with a minute tomentum; pale 

 reddish gray or alutaceous, the thin margin concolorous and sometimes 

 a little roughened, often sterile beneath; flesh slightly fibrous, zonate, 

 concolorous; pores minute, unequal, angular, about 2 mm. long, dis- 

 sepiments thin, acute, toothed or lacerated, whitish becoming darker 

 with age, and blackish-stained when bruised. 



This little species is rarely collected in Wisconsin and is also reported 

 as ' ' rare ' ' in Iowa by Macbride. Only two specimens have thus far been 



