MURRILL : POLYPORACEAE OF NORTH AMERICA 369 



7. PYROPOLYPORUS Murr. Bull. Torrey Club 30 : 109. 1903. 

 Type : Boletus igniarius L. 



Mison Adans. Fam. 2:10. 1 763. Not associable with a binomial 



species. 



Type : Boletus igniarius L. (Micheli's//. 62). 

 Agaricon Adans. Fam. 2: 10. 1763. Not Agaricus L. 1753. 



Type : Boletus igniarius L. (Tournefort's pi. JJj). 

 Phellinus Quel. Ench. Fung. 172. 1886. Not Phelline Poir. 1826. 



Type : Boletus igniarius L. 



Hymenophore large, perennial, epixylous, sessile, ungulate or 

 applanate ; surface sulcate, usually anoderm and often rough or 

 rimose : context woody or punky, brown, rarely dark -red ; tubes 

 brown, cylindrical, stratose, usually thick-walled : spores smooth, 

 ferruginous, rarely hyaline. 



Species: P. igniarius (L.) Murr., P. fulvns (Scop.) Murr., P. 

 crustosus Murr., P. Calkinsii Murr., P. Everhartii (Ell. & Gall.) 

 Murr., P. Robiniac Murr., P. pracrinwsus Murr., P. Undenvoodii 

 Murr., P. junipcrinus (Schrenk) Murr., P. Earlci Murr., P. con- 

 cliatus (Pers.) Murr., P. Haematoxyli Murr., P. Langloisii Murr., 

 P. Ribis (Schum.) Murr., P. yucatanensis Murr., P. senex (Nees 

 & Mont.) Murr., P. linteus (B. & C.) Murr., P. jamaicensis Murr. 

 [see Bull. Torrey Club 30 : 109-120. 1903]. 



8. NIGROFOMES Murr. Bull. Torrey Club 31 : 425. 1904. 



Type : Nigrofouies melanoporus (Mont.) Murr. 



Hymenophore large, perennial, epixylous, sessile : context 

 woody, purple ; tubes cylindrical, stratose, thick-walled, black : 

 spores ovoid, smooth, hyaline. 



Species : N. melanoporus (Mont.) Murr. /. c. 



Subfamily 3. AGARICEAE 



Hymenium annual, very rarely perennial, coriaceous to woody, 

 variable in size ; surface anoderm, hairy or glabrous, variously 

 marked : context white or brown, fibrous, woody or punky ; 

 hymenium exceedingly variable, normally labyrinthiform or lamel- 

 loid, but often poroid or even irpiciform, never stratified : spores 

 smooth, brown or hyaline. 



Poroid and irpiciform plants of this group are difficult to separ- 

 ate from certain species of the Polyporcae ; forms of Agaricus con- 

 fragosus in particular being troublesome to the beginner. On 



