THE POLYPORACEAE OF WISCONSIN. 43 



The tubes were small, equal, and about 4 mm. in length with thick 

 dissepiments. 



Syn. Polystictus rigens Sacc. et Cub., 26 vol. VI, p. 274. 



§3. Substance tawny or ferruginous. 



Trametes odorata (Wulff.) Fries (Plate II. fig. 10). 



Pileus pulvinate, 5 to 8 cm. broad, corky, somewhat soft, shaggy, 

 during the first year brownish-yellow, later blackish-brown, widened, 

 concentrically furrowed, wrinkled, tomentose, with cinnamon colored 

 margin; pores roundish, or oblong, cinnamon. 



On old spruce trunks. 



Common. In the woods on spruce logs ; otherwise on spruce planks 

 and timbers. A small but very common form grows on the planks 

 and sleepers of sidewalks made of hemlock lumber. Here the species pro- 

 duces a brownish rot in the wood which causes it to crumble into a fine 

 brown powder, not unlike that produced by Lenzites sepiaria and Fomes 

 ungulata. 



Our specimens were found in Oneida County, on hemlock logs, and 

 in La Crosse County, Monroe County and Dodge County, on sidewalks 

 and bridge timbers. The largest measure about 7 cm. broad and 6 to 8 

 cm. long ; in thickness they vary from 0.5 to 3 cm. 



The pilei may be dimidiate sessile or entirely resupinate. Usually 

 the specimens grow only one season, but many specimens especially 

 resupinate forms growing on the underside of bridge timbers have 

 from two to three strata. The specimens found on spruce trunks in 

 the woods also show several years growth. 



The pores and margin when growing are almost cream-yellow, but 

 soon change to cinnamon brown. At first they are soft and moist, 

 staining brown where bruised, but they become corky and brown, and 

 at last blackish and hard. At first the specimens are tomentose shaggy 

 but by weathering they become glabrate and rough. The pores are 

 medium, equal, thick-walled, about as long as the thickness of the 

 pileus. The specimens growing on worked timbers are usually softer 

 in substance and richer in color. 



The odor is not very pronounced. When fresh they have merely a 

 disagreeable fungus smell, but on drying the odor becomes stronger 

 and sweetish. In habit and appearance the younger specimens 

 strongly resemble Lenzites sepiaria. 



The distinguishing characteristics are the rich cinnamon-brown 



