NORTHERN POLYPORES 



Including the pileate species occurring in eastern Canada and 

 the northern United States southward to the southern boundaries 

 of Virginia, Kentucky, Missouri, and Kansas, and westward to 

 the western boundaries of Kansas, Nebraska, and the Dakotas. 



POLYPORACEAE 



Hymenophore annual or perennial; context fleshy-tough, 

 corky, or woody; hymenium poroid or lamelloid, fleshy to woody, 

 never gelatinous. 



Hymenium porose. 



Hymenophore annual. Tribe i. POLYPOREAE. 



Hymenophore perennial. 1 Tribe 2. FOMITEAE. 



Hymenium furrowed. 2 Tribe 3. DAEDALEAE. 



Tribe i. POLYPOREAE. Hymenophore variable in size and shape, fleshy- tough 

 to corky, annual, sometimes reviving; surface encrusted or anoderm, glabrous 

 or hairy, zonate or azonate; context fibrous, rarely punky, variously colored; 

 tubes cylindric, sometimes splitting into teeth, usually thin-walled; spores 

 rounded or oblong, brown or hyaline; cystidia frequently present; surface of 

 pileus never conidia-bearing; stipe often present, variously attached. 



Context white. 



Hymenophore sessile. 



Tubes hexagonal, arranged in radiating rows; context 



thin. ii. HEXAGONA. 



Tubes mostly shallow, marginal and obsolete; hy- 

 menium hydnoid or irpiciform at a very early 

 stage. i. IRPICIPORUS. 



Tubes normally poroid, sometimes irpiciform from 



the rupture of the dissepiments at maturity. 

 Hymenium at length separating smoothly from 



the context. 9. PIPTOPORUS. 



Hymenium not separating as above. 



Context duplex, spongy above, firm below; 



surface sodden and bibulous. 6. SPONGIPELLIS. 



1 Elfvingia lobata is an exception. Porodaedalea is closely allied to the Daeda- 

 leae. Cryptoporus should be in a distinct tribe. 



2 Cerrena shows an irpiciform hymenium at maturity, much resembling species 

 of Coriolus. Daedalea and Gloeophyllum sometimes show poroid forms that are 

 very confusing. 



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