THE POLYPORACEAE OF WISCONSIN. 



Quite common in fall and late summer growing on railroad ties, fal- 

 len branches in the woods and decayed logs and fence posts. Localities : 

 Bangor, Sparta, Milwaukee, Madison, Elkhorn, Crandon and Star 

 Lake. The largest specimen was 7 cm. in diameter with a stipe 2 cm- 

 long and 6 mm. thick. 



The pileus is usually circular but sometimes irregular and wavy. The 

 color varies from almost black to yellowish brown. Most of them are 

 of a dusky brown, often becoming lighter towards the margin. A few 

 specimens found at Bangor were of a pale cream color. 



The stipe is usually short, central or excentric, sometimes scaly but 

 more generally hirsute. The pores vary in size from very small and 

 round, to 0.5 mm. in length. When large, they are usually radially 

 elongated. The species is closely related to P. lentus and P. arcularius. 

 Both of these have larger pores. 



Polyporus lentus Berk. (Plate XIII, fig. 48.) 



Pileus fleshy, tough, then coriaceous, umbilicate, minutely scaly ; pale 

 ochraceous ; stipe short, incurved, hispid, and furfuraceous, concolorous. 

 Pores decurrent, irregular, white. 



Morgan (18, VIII, p. 93) says that the pores are deep, roundish or 

 subquadrate. 



Not common. Blue Mounds (Dodge) on ground; probably growing 

 on wood underneath. This specimen is Dodge's Polyporus sp. 



Largest specimen : diameter 5 cm. ; stipe about 11 cm. long and 5 

 mm. thick. The substance is leathery-tough, drying hard but rather 

 fragile. The pores are rather large for a Polyporus, angular or quad- 

 rate, decurrent upon the stipe. The species seems to be affiliated with 

 Fomes europeus, but is centrally stiped and the pores are smaller. 



Polyporus tomentosus Fries. 



Pileus irregular, up to 12 cm. in diameter, often several pilei con- 

 fluent and imbricated, of corky hard consistency, zoneless. Stipe some- 

 times central, sometimes lateral, short, colored like the pileus. Porea 

 small, irregular, obtuse, entire, at first white-pruinose. On the ground 

 in woods of coniferous trees. 



Not common. A few specimens were collected at Brule river, and 

 some were collected near Shanagolden and Algoma. The largest speci- 

 men measured about 12 cm. in breadth and 9 cm. in length, with a 

 thickness of about 10 mm. The stipe is 2 cm. long and 2 cm. thick. In 



