TROPICAL POLYPORES 65 



28. FLAVIPORUS Murrill 



Hymenium annual, often reviving, epixylous, sessile, dimidiate, 

 imbricate; surface encrusted, glabrous; context thick, woody, 

 brown; hymenium yellow to orange; tubes thin-walled, minute, 

 regular; spores smooth, hyaline. 



Hymenium pale-lemon-yellow. i. F. rufoflavus. 



Hymenium deep-orange-colored. 2. F. crocitinctus, 



i. FLAVIPORUS RUFOFLAVUS (Berk. & Curt.) Murrill 



Pileus dimidiate, I X 2-3 X 0.1-0.4 cm.; surface rufous, thinly 

 encrusted, finely pubescent to glabrous, polished, zonate; margin 

 thin, undulate; context thin, pallid, less than I mm. thick; 

 tubes slender, 1-2 mm. long, yellowish, mouths very minute, 

 angular, citrinous, 7-10 to a mm., edges thin, entire. 



Occasional on decaying wood throughout most of tropical 

 America; also in hothouses and mines in Europe. 



2. FLAVIPORUS CROCITINCTUS (Berk. & Curt.) Murrill 



Pileus hard, rigid, dimidiate, laterally connate, subimbricate, 

 3 X 5 X 0.3-0.5 cm.; surface brown to black, thinly encrusted, 

 sulcate, zonate, rugose, finely tomentose to glabrous, subshining; 

 margin thin, finely tomentose, yellowish, lobed in type specimens; 

 context thin, fibrous, flavous to luteous, scarcely I mm. thick; 

 tubes slender, 2-4 mm. long, yellow to ferruginous, mouths 

 circular to angular, stuffed when young, 4-5 to a mm., edges thin, 

 entire, flavous to luteous. 



Found once on decaying wood in Cuba. 



29. POGONOMYCES Murrill 



Hymenophore annual, epixylous, dimidiate-sessile to flabelli- 

 form, thickly covered with rigid hairs; context dark-brown, 

 punky to corky; tubes short, thick-walled, light-brown, mouths 

 small, circular; spores smooth, hyaline. 



i. POGONOMYCES HYDNOIDES (Sw.) Murrill 



Pileus dimidiate, sessile, often imbricate, conchate, 3-5 X 5-10 

 X 0.5-1 cm.; surface zonate, tawny-bay to nearly black, con- 

 spicuously and thickly covered with rigid, branched fibers, which 

 often more or less disappear with age ; margin entire or undulate, 

 pallid, acute, sterile below; context fulvous at maturity, zonate, 

 punky to corky, 3-5 mm. thick; tubes rather long, grayish- 

 umbrinous within, equaling the thickness of the context, mouths 



