THE POLYPORACEAE OF WISCONSIN. 57 



Poria ferruginosa (Schrad.) Bres. 



Effused, firm, thick (2.5 cm.) uneven, yellowish-brown, old specimens 

 chestnut — or rusty-brown, with sterile margin. Pores medium, very 

 long, rotund and torn, cinnamon-brown. 



Specimens were found at Horicon on an oak rail, but are not com- 

 mon in the southern part of the state. In Oneida, Vilas, Ashland and 

 Forest Counties this species is quite common on the bark of dead arbor 

 vitae. 



When young the specimens are soft-felt-like but they soon become 

 hard and firm. The color is a rich rusty ferruginous when fresh, ap- 

 proaching cinnamon in older specimens. The surface is very uneven, 

 being usually higher in the center. The pores are unequal, varying 

 from small, near the margin to large in the center. The tubes also 

 vary in length from 1 mm. near the margin to 5 mm. in the center. 

 The pores are usually rotund, but may be irregular and even sinuous. 



The subiculum is inseparable. The margin is not always conspicu- 

 ous; in young specimens it is often of a golden-brown and velvety. 

 The tubes are lined with many large cystidia. 



Poria laevigata Fries. 



Broadly effused, leathery rigid, determinate but immarginate, sep- 

 arable from the substratum when mature, even, cinnamon, pores very 

 small, round, entire. 



"Well-developed specimens were found on birch at Orandon and 

 Muscallonge Lake. The largest were 3 mm. thick by 12 or more cm. 

 broad and were plainly stratified and very woody so as to possibly re- 

 semble a resupinate effused specimen of Fomes nigricans. The sur- 

 face is very uneven almost nodular due to irregularities in the bark 

 and the color a deep almost purplish-brown. 



Poria Andersoni (Ellis & Everhart). 



A resupinate plant with golden yellow spores, covering large areas 

 of decaying wood; mycelium thin, dirty white, forming an almost im- 

 perceptible subiculum ; pores at first whitish-yellow folds of the subicu- 

 lum, leaving scarcely any margin not occupied by various stages of im- 

 perfectly formed pores, at length appearing yellowish from the abund- 

 ant spores; pores finally yellowish-brown or dark russet, slightly an- 

 gular, small (0.25 mm.) becoming cristate at the mouth, 1cm. or less 



