THE POLYPOBACEAE OF WISCONSIN. 91 



Morgan (18, VIII, p. 101—102) says that the pileus is from 10 to 15 

 cm. or nearly 30 cm. in diameter; that the color varies greatly with 

 age, being at first a gorgeous crimson-orange, then growing paler 

 through orange to alutaceous; the hymenium growing darker through 

 brownish crimson to dark brown. The substance, he says, varies to 

 reddish and pale wood color and is remarkably zonate. 



Collected at Devil's Lake in July and August of 1903, 1904 and 1906. 

 It was growing on very rotten oak logs and stumps. It was a bright 

 orange when fresh, of a soft spongy consistency. The color fades very 

 much in drying. The distinctly concentrically zonate substance is pale 

 wood color, with reddish stains. The rough somewhat pitted sur- 

 face is grayish with reddish-brown spots. It is covered with a very 

 slight tomentum. 



The pileus is thick and irregularly triangular in cross-section. The 

 pores are not very long, round ; dissepiments thick, wood color. The 

 pileus projects about 8 cm. and is about 8 cm. thick through the thickest 

 part. 



Its soft, fleshy substance when fresh and its bright color are the chief 

 distinguishing marks. 



Syn. : Aurantiporus Pilotae (Schw.) Murr. pr. p.; 19, 32, p. 487. 



Polyporus pubescens (Schumacher) Fries (Plate XI, fig. 36). 



Pileus fleshy becoming tough, suberose, soft, convex, subzonate, pub- 

 escent, white throughout; margin acute, at length yellowish; pores 

 short, small, nearly round, even. 



Our specimens probably belong to the variety grayii E. and E., 

 which differs from the type in the elongation of the tubes ; but Bresa- 

 dola thinks that this variety is the same as Polystictus velutinus. As 

 a matter of fact, I have found it difficult always to distinguish easily 

 between the two species, except that Polyporus pubescens is thicker and 

 more hirsute than Polystictus velutinus. In substance and habit they 

 are alike. 



When growing, P. pubescens is of a moist, soft, almost leathery con- 

 Bistency but dries into a light, brittle, corky, substance. It is pure white 

 within and without, but becomes yellowish in drying. The pubescence 

 is quite as dense and coarse occasionally as that of P. Jiirsutus, but usu- 

 ally it is much softer and finer making the pileus agreeably velvety to 

 the touch. 



The pilei are always very convex above and concave below, more or 

 less gibbous and decurrent at the base and more or less laterally conflu- 

 ent. 



