36 SOUTHERN POLYPORES 



to partially glabrous, rather smooth, subshining, fulvous with 

 bay zones; margin very thin, entire, ferruginous; context thin, 

 ferruginous to fulvous, fibrous-spongy, I mm. thick; tubes 

 short, 1-2 mm., fulvous, glaucous near the mouths, which are 

 very minute, regular, circular, 7-9 to a mm., edges thick, entire, 

 pale-ferruginous to purplish-ferruginous; spores ellipsoid or 

 subglobose, 3-4X2-3^; cystidia subulate, chestnut-colored, 

 15-25 X 6 M. 

 Common on dead wood in the Gulf states. 



24. ISCHNODERMA P. Karst. 



Hymenophore large, annual, epixylous, sessile; surface pellicu- 

 lose, glabrous; context light-brown, fleshy to slightly corky, 

 friable when dry; tubes small, thin- walled; spores smooth, 

 hyaline. 



i. ISCHNODERMA FULIGINOSUM (Scop.) Murrill 



Pileus very large, subimbricate, laterally connate, effused- 

 reflexed, often covering the entire under surface of logs, the 

 reflexed portion applanate, 5-15 cm. long, 10 to many cm. 

 broad, 1-2.5 cm - thick; surface pelliculose, floccose, rugose, 

 zonate, fuliginous, ivory-black, and dark-fulvous, with a con- 

 spicuous resinous appearance; margin acute, concolorous, inflexed 

 on drying, entire or undulate; context fleshy, becoming corky 

 with age, very firm and rather fragile when dry, light-brown, 

 5-10 mm. thick; tubes pallid to umbrinous, 5-8 mm. long, 

 mouths minute, white, angular, equal, becoming umbrinous and 

 somewhat irregular with age, edges thin, fimbriate to lacerate; 

 spores cylindric, subcurved, 4-6 X 1.5-2 /x. 



Frequent throughout most of the region on fallen trunks of 

 basswood, maple, and certain other trees. 



25. 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 



