32 NORTHERN POLYPORES 



multiple, central or eccentric, sometimes distorted, equal or 

 slightly attenuate below, paler than the pileus, glabrous, solid, 

 4 cm. or more long, 5-18 mm. thick. 



Occasional in eastern Canada, New York, and Wisconsin, 

 occurring on the ground in woods, usually associated with decay- 

 ing wood. This species has been confused with Polyporus 

 fractipes Berk. & Curt., described from South Carolina. 



16. PYCNOPORELLUS Murrill 



Hymenophore annual, epixylous, sessile, dimidiate, simple or 

 imbricate, reddish or orange-colored throughout; surface ano- 

 derm, margin thin; context thin, friable; tubes thin-walled, 

 fragile, at length lacerate; spores smooth, hyaline or pale- 

 yellowish. 



i. PYCNOPORELLUS FIBRILLOSUS (P. Karst.) Murrill 



Pileus soft, spongy, fragile when dry, thin, dimidiate, imbri- 

 cate, 3-5 X 6-8 X 0.5-1 cm.; surface anoderm, orange-colored, 

 fibrillose-tomentose, zonate, at times uneven and sodden in 

 appearance; margin thin, subentire, tomentose, paler; context 

 obscurely zoned, orange-colored, friable when dry, spongy and 

 absorbing water when fresh, 3-5 mm. thick; tubes annual, 3-5 

 mm. long, pallid to orange-colored, mouths angular, irregular, 

 1-2 to a mm., edges very thin, pallid and entire when young, at 

 length orange-colored and very lacerate; spores smooth, oblong, 

 hyaline or pale-yellowish, 6-7 X 3-4 M- 



Occasional on dead coniferous wood in New York and north- 

 ward, extending around the world. Reported from Massachu- 

 setts on maple. 



17. PYCNOPORUS P. Karst. 



Hymenophore annual, sometimes reviving, epixylous, sessile, 

 dimidiate, simple or imbricate, rarely pseudo-stipitate; surface 

 anoderm, slightly pelliculose at times, zonate or azonate, bright- 

 er dull-red; context red, soft-corky to punky; hymenium con- 

 colorous, tubes small, firm, thin- walled ; spores smooth, hyaline. 



i. PYCNOPORUS CINNABARINUS (Jacq.) P. Karst. 



Pileus convex-plane, dimidiate, laterally extended, reviving 

 the second season, 4-6 X 5-10 X 0.5-1 cm.; surface azonate, 

 rugulose, pruinose to tomentose, at length glabrous, the color 

 changing from light-orange to cinnabar-red, often fading with 

 age; margin acute, except in large plants, faintly zonate; context 

 floccose, elastic, zonate, reddish; tubes nearly equaling the 



