THE POL7PORACEAE OF WISCONSIN. 97 



Collected at Star Lake in August 1901. It measures about 5 cm. long, 

 4.5 cm. wide, and scarcely 1 cm. thick. The base is somewhat narrowed 

 behind and drawn down, thus differing a little from the type. The sur- 

 face is rough and tomentose. The margin is thickish and drawn in- 

 wards on drying so that there seems to be a broad sterile band. 



The pores are medium, at first shallow and obtuse, then deeper and 

 dentate, appearing lacerate in places, tawny. 



Polyporus spumeus (Sowerby) Fries. 



Pileus compact, pulvinate, gibbous, strigosely-hispid, with stem-like 

 base, margin incurved, whitish, fleshy-spongy, about 8 cm. broad ; pores 

 small, round, sharp, entire, separable from the pileus. 



On old trunks of various deciduous trees. 



Massee (17, p. 253) says -that the species grows "on living or dead 

 trunks. The plants are 3 4 inches across, oozing out of a tree in a 

 very soft mass which hardens in a day, and if it dries favorably the 

 pileus becomes hispid. ' ' 



Only a few specimens were found, one at Madison on hickory and a 

 few growing out of chinks in the end of an elm log at Shanagolden. 

 The largest specimen when fresh measured about 8 cm. in width, 4 cm. 

 in length and 2.5 cm. to 3 cm. in thickness, but it shrunk to about two- 

 thirds its former size. 



The specimens were quite soft, moist hispid, obtuse, and of a red- 

 dish straw color when fresh. They could hardly be said to have a stem- 

 like base, however, unless the mycelium by which they were attached in 

 the chinks of the log be called the stem. In color and shape the fresh 

 specimens looked very much like Daedalea obtusa. The pores are me- 

 dium, toothed and irregular. 



Syn.: Spongipellis spumeus (Sow.) Pat; 13, 3, p. 17; 19, 32, p. 474. 



Polyporus guttulatus Peck (Plate XI, fig. 38). 



Pilei of a cheesy consistency, broad, flattened, sometimes confluent, 

 sessile or narrowed into a short stem, slightly uneven, white or yellow- 

 ish-white, marked with darker zones and watery spots; pores minute, 

 subangular, short, whitish sometimes tinged with brown; flesh white; 

 10 to 15 cm. broad, 12 to 16 mm. thick. Trunks, July. 



In texture and shape this species is related to P. sulphureus, but the 

 pores are smaller than in that species. Plants are sometimes cespitose, 



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