NORTHERN POLYPORES 33 



context, firm, miniatous within, the mouths small, 2-3 to a mm., 

 regular, coccineous, dissepiments rather thin, entire; spores 

 6-8 X 2-3 p. 



Common throughout on dead wood of various deciduous trees. 



18. AURANTIPORUS Murrill 



Hymenophore large, annual, epixylous, sessile, dimidiate; 

 surface anoderm, sodden, bibulous, reddish-orange, soon fading; 

 context reddish-yellow, fleshy- tough to woody, juicy when 

 fresh, rigid when dry, conspicuously zonate; tubes small, slender, 

 thin- walled, brilliant-orange when fresh, becoming dark, resinous, 

 and fragile on drying; spores smooth, hyaline. 



i. AURANTIPORUS PILOTAE (Schw.) Murrill 



Pileus sessile, often subradicate, dimidiate, convex, 8-20 

 X 10-40 X 1-3 cm.; surface rugose, sodden, velvety with short 

 hairs, ochraceous or reddish-orange, soon fading, brownish 

 behind; margin ochraceous, sterile, tumid, becoming thinner at 

 maturity; context melleous, tough, watery, elastic, rigid when 

 dry, conspicuously marked with sordid zones, odor strong but 

 not characteristic; tubes 5-10 mm. long, luteous-orange to 

 bright-orange when fresh, becoming dark and resinous on drying, 

 the mouths small, regular, concolorous, 4-5 to a mm., dissepi- 

 ments thin, minutely fimbriate; spores 3-4 X 2-3 /*. 



Frequent throughout on much-decayed oak and chestnut logs. 

 Probably not distinct from P. croceus Pers. of Europe. 



19. LAETIPORUS Murrill 



Hymenophore annual, epixylous, fleshy, anoderm, cespitose- 

 multiplex; context cheesy to fragile, light-colored; tubes thin- 

 walled, fragile, bright-yellow, mouths irregularly polygonal; 

 spores smooth, hyaline. 



i. LAETIPORUS SPECIOSUS (Batt.) Murrill 



Hymenophore cespitose-multiplex, 30-60 cm. broad; pileus 

 cheesy, not becoming rigid, reniform, very broad, more or less 

 stipitate, 5-15 X 7-20 X 0.5-1 cm.; surface finely tomentose to 

 glabrous, rugose, anoderm, subzonate at times, varying from 

 lemon-yellow to orange, fading out with age; margin thin, fer- 

 tile, concolorous, subzonate, finely tomentose, undulate, rarely 

 lobed ; context cheesy, very fragile when dry, yellow when fresh, 

 usually white in dried specimens, 3-7 mm. thick; tubes annual, 

 2-3 mm. long, sulphur-yellow within, mouths minute, angular, 



