SOUTHERN POLYPORES 17 



finely tomentose, pale-isabelline, subzonate at times; margin 

 thin, concolorous, undulate, easily blackening, usually broadly 

 sterile; context fibrous-corky, somewhat zonate, white to pallid, 

 5-15 mm. thick; tubes short, 2-3 mm. long, white to discolored 

 within, mouths regular, even, circular, 4-5 to a mm., whitish to 

 smoky-isabelline and finally blackish with extreme age, edges 

 thick, entire; spores globose, 5-8 /*. 



Common throughout on decayed deciduous wood and rarely 

 on coniferous wood. B. puberula (Berk. & Curt.) Murrill is not 

 sufficiently distinct. 



8. TRAMETES Fries 



Hymenophore annual, epixylous, sessile; surface anoderm, 

 white, azonate; context white, homogeneous, coriaceous to soft- 

 corky; hymenium concolorous, rigid; tubes thin-walled, mouths 

 circular to irregular; spores smooth, hyaline. 



i. TRAMETES SUBNIVOSA Murrill 



Pileus imbricate, dimidiate, laterally connate, very rigid 

 when dry, 3-5 X 6-8 X I cm.; surface finely tomentose to 

 glabrous, smooth, opaque, white to sordid-white, azonate; margin 

 thin, irregular, undulate, sterile, pallid; context zonate, white to 

 discolored, fibrous-corky, very firm, 4-7 mm. thick; tubes 2-4 

 mm. long, white within, mouths regular, nearly even, 6 to a mm., 

 edges thin, subentire, white to isabelline or avellaneous, glisten- 

 ing, umbrinous with age. 



Occasional on dead deciduous wood in Florida, Mississippi, 

 and Louisiana. Also found on living water oak at New Orleans 

 and on cypress at Eustis, Florida. 



9. RIGIDOPORUS Murrill 



Hymenophore annual, at times reviving, epixylous, sessile, 

 dimidiate to circular, simple or imbricate; surface pelliculose, 

 multizonate, margin thin, incurved when dry; context thin, 

 white, fleshy-corky, very rigid when dry; tubes minute, regular, 

 light-colored, mouths usually pruinose when young; spores 

 smooth, hyaline. 



i. RIGIDOPORUS SURINAMENSIS (Miq.) Murrill 



Pileus imbricate-multiplex, laterally connate, dimidiate or 

 reniform, fleshy-corky, convex or applanate, 2-3 X 2.5-5 X 0.3- 

 0.6 cm.; surface smooth or rugulose, pruinose to glabrous, 



