NORTHERN POLYPORES 39 



dark-fulvous, edges thin, entire to toothed; spores subglobose, 

 smooth, deep-ferruginous, 6-7 /*; cystidia scanty and short. 



Occasional throughout on living or dead oak trunks, causing 

 serious decay. 



4. INONOTUS PERPLEXUS (Peck) Murrill 



Pileus spongy-fleshy, fibrous, sessile, dimidiate to flabelliform, 

 often narrowly attached, usually imbricate, somewhat laterally 

 connate, 4-6 X 5-10 X 0.5-1 cm.; surface hairy-tomentose to 

 setose-hispid, grayish-tawny to ferruginous, azonate, smooth, 

 anoderm, becoming somewhat glabrous and subzonate with age; 

 margin acute, sterile, pallid, entire; context tawny-ferruginous, 

 subzonate, 2-3 mm. thick; tubes 3-5 mm. long, brownish- 

 ferruginous within, mouths angular to irregular, 3-4 to a mm., 

 edges acute, fimbriate to lacerate, hoary to dark-fulvous; spores 

 broadly ellipsoid, smooth, deep-ferruginous, 5-7 X 4-5.5 /x. 



Rather common throughout on dead or decaying trunks of 

 beech, maple, and other deciduous trees. Near P. cuticularis of 

 Europe. 



5. INONOTUS RADIATUS (Sow.) P. Karst. 



Pileus corky to woody, imbricate, confluent, sessile, umbonate 

 behind, especially when young, 3-5 X 6-9 X 0.5-1 cm.; surface 

 radiate-rugose to very uneven, minutely velvety to glabrous, 

 fulvous to ferruginous-fuscous or almost black behind; margin 

 thin, pallid, undulate to lobed; context subzonate, ferruginous 

 to dark-fulvous, 1-3 mm. thick; tubes slender, grayish-umbrinous 

 to fulvous, about 5 mm. long, mouths angular, somewhat ir- 

 regular, 3-5 to a mm., edges whitish at first, becoming dark- 

 fulvous with age, glistening, thin, fimbriate to lacerate; spores 

 ellipsoid, luteolous, 4-6 X 3-4 M. 



Rather common throughout on decayed alder, birch, maple, 

 and certain other deciduous trees. The usual form found on 

 maple is quite different from the typical form on alder and birch 

 and has been called P. glomemtus by Peck. The same two forms 

 are said to occur in Europe. 



27. PHAEOLUS Pat. 



Hymenophore large, irregular, annual, spongy to corky, 

 epixylous; stipe simple, variously attached, wanting at times; 

 surface of pileus anoderm, hispid; context ferruginous; tubes 

 irregular, thin-walled; spores ellipsoid, smooth, hyaline; cystidia 



