90 THE POLYPORACEAE OF WISCONSIN. 



found ; one by Cheney in the Lake Superior region, and one by myself 

 at Ladysmith on a small stump. 



The largest specimen is about 5 em. wide and 2 cm. long, but less than 

 5 mm. thick except at the base where it is somewhat gibbous. In color, 

 shape and general habit it strongly resembles P. adustus. However, 

 the pores are larger and longer and more irregular, the dissepiments, 

 are toothed, and do not become smoky or black when bruised, but 

 merely darken somewhat in color. The dried specimen on the whole is 

 more yellowish than either P. adustus or P. fumosus. From both of 

 these species it can also be distinguished by its pleasant odor which is 

 quite persistent after drying. 



Syn. : Bjerkandera fragrans (Peck) Murr. ; 19, 32, p. 636. 



Polyporus aurantiacus Peck (Plate XI, fig. 35). 



Pileus soft, thin, sessile, dimidiate, sometimes confluent, fibrous-to- 

 mentose, obscurely zoned, orange-color ; pores small, angular, acute, un- 

 equal, at length lacerated, pallid inclining to orange ; flesh tinged with 

 orange ; obscurely zoned. Pileus 2.5 to 5 cm. broad, pores 2 mm. long. 

 On old logs, July. Related to Polystidus biformis. 



Not common. Collected at Blue Mounds, Brule River (Overton), at 

 Crandon on a birch log, and Ladysmith on a maple log. Largest speci- 

 men 8 cm. broad, 3 cm. long and 3 cm. thick in its thickest part. Most 

 of the specimens, however, are small. The pilei are soft-spongy at first, 

 becoming coriaceous. The color is orange-red at first, but becomes an 

 orange-brown with age. 



The pores in our specimens are quite large, irregular and unequal. 

 The dissepiments are thin and often torn. When growing they are 

 cream-color inclining to reddish-orange. In form, the pilei may be ses- 

 sile, imbricated, rosetted or confluent. The surface is rough-tomentose 

 and uneven. 



The orange tints and the large irregular, soft, cream-colored pores 

 are the chief distinguishing characteristics. It may be the same spec- 

 ies as P. fibrillosus. Karst. 



Polyporus Pilotae Schw. 



Crimson-orange. Pileus very large, pulvinate or subungulate, 

 nearly glabrous, spongy, fibrous, becoming hard and corky; the sub- 

 stance within uneven, zonate. Pores long, medium dissepiments at 

 first round and thick, then thin and angular. 



