SOUTHERN POLYPORES 37 



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 

 small, circular to somewhat angular, 3-4 to a mm., edges thick, 

 entire, pallid to umbrinous; spores oblong, 8-10 X 3-4 /* 



Extremely common in the Gulf states on various forms of 

 dead wood. 



26. NIGROPORUS Murrill 



Hymenium annual, epixylous, dimidiate-sessile to flabelliform, 

 glabrous; context dark-brown, firm, homogeneous; tubes short, 

 slender, thin- walled, black; spores smooth, hyaline. 



i. NIGROPORUS VINOSUS (Berk.) Murrill 



Pileus thin, dimidiate to reniform, imbricate, narrowly at- 

 tached by a scutate disk or laterally connate and broadly de- 

 current, 1-3 X 3-6 X 0.1-0.3 cm.; surface zonate, finely velvety 

 to glabrous, obscurely vinous-brown; margin yellowish when 

 young, thin, undulate, often inflexed on drying; context rigid, 

 tough, chestnut-colored, 1-2 mm. thick; tubes minute, short, 

 scarcely a mm. in length, smoky-black, mouths regular, angular, 

 7-9 to a mm., edges thin, entire, vinous-brown, pruinose when 

 young, blackish with age; spores allantoid, 3-4 X 1-1.5 M- 



Found once on dead wood in Georgia. 



27. INONOTUS P. Karst. 



Hymenophore annual, epixylous, sessile, dimidiate, simple or 

 somewhat imbricate, variable in size; surface usually anoderm, 

 brown, hairy or glabrous; context brown, thin and fibrous to 

 spongy or corky; hymenium concolorous, usually covered with 

 whitish powder in youth, tubes small, thin- walled; spores 

 smooth, light- to dark-brown. 



Hymenophore sessile. 



Hymenophore large, 10-30 cm. or more broad. 



Surface conspicuously hirsute. i. /. hirsutus. 



Surface glabrous. 



Spores pale-brown. 2. I. dryadeus. 



Spores deep-brown. 3. /. dryophilus. 



Hymenophore of medium size, about 5-10 cm. broad. 

 Spores deep-brown in color. 



Context multizonate and iridescent. 4. /. texanus. 



Context neither zonate nor iridescent. 



58566 



