[From the Bulletin of rut: Torrby Botanical Club, 32 : 353-371. 1405. J 



The Polyporaceae of North America — XI, A synopsis of the brown 



pileate species 



William Alphonso Murrill 



An attempt is made in the present paper to summarize in con- 

 venient form for reference the results of former studies covering 

 all North American polypores having a distinct pileus with dark- 

 colored substance, and, in addition, to give generic keys and 

 diagnoses of new genera not already treated that come within this 

 subgroup. 



Family POLYPORACEAE 



Hymenophore annual or perennial : context fleshy-tough, 

 corky or woody ; hymenium poroid or lamelloid, fleshy to 

 woody, never gelatinous. 



Synopsis of the subfamilies 



Hymenium porose. 



Hymenophore annual. I. PoLYPOREAE. 



Hymenophore perennial. 2. Fomiteae. 



Hymenium furrowed. 3. Agariceae. 



Subfamily i. Polyporeae 



Hymenophore varied in size and shape, fleshy-tough to corky, 

 annual, sometimes reviving and rarely perennial in the tropics ; 

 surface encrusted or anoderm, glabrous or hairy, zonate or 

 azonate : context fibrous, rarely punky, variously colored ; tubes 

 cylindrical, 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. 



Synopsis of the Polyporeae witli brown context 



Hymenophore sessile. 

 Spores hyaline. 



Context light-brown. 



Context at first fleshy, becoming slightly corky. 1. Ischnoderma. 



Context tough from the first. 



Surface encrusted. 2. Antrodia. 



Surface not encrusted. 



Surface glabrous or nearly so. 



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