1 6 SOUTHERN POLYPORES 



2. SPONGIPELLIS FISSILIS (Berk. & Curt.) Murrill 



Pileus dimidiate to flabelliform, subimbricate, elongate and 

 decurrent behind, convex, 4-6 X 7-15 X 1-2 cm.; surface white 

 to isabelline, at length discolored, opaque, somewhat radiate- 

 rugose, finely spongy-tomentose, setose or fibrillose to sub- 

 glabrous; margin rather thin, fertile, undulate to lobed, discolored 

 and inflexed when dry; context conspicuously zonate, fibrous, 

 fissile, watery and white when fresh, rigid and hard, with an 

 unpleasant odor on drying, 5-10 mm. thick; tubes 3-8 mm. 

 long, white to isabelline, at length resinous and bay to black, 

 mouths angular, 2 to a mm., edges thin, nearly entire, collapsing 

 into a rigid mass; spores ovoid, 5 X 3 M- 



Occasional on dead or decaying deciduous wood from North 

 Carolina to Florida and Louisiana. 



7. BJERKANDERA P. Karst. 



Hymenophore annual, epixylous, sessile, anoderm, glabrous, 

 azonate, corky; context white, tough or woody, not friable when 

 dry; tubes thin- walled, more or less smoke-colored, mouths 

 polygonal; spores smooth, hyaline. 



Hymenium smoke-colored when young, soon becoming black. i. B. adusta. 



Hymenium pallid when very young, becoming more or less blackish 



with age. 2. B. fumosa. 



1. BJERKANDERA ADUSTA (Willd.) P. Karst. 



Pileus cespitose-imbricate, decurrent, sometimes effused, 

 conchate, fleshy-tough or corky, somewhat flexible when dry, 

 2-4 X 4-8 X 0.2-0.4 cm.; surface undulate, indistinctly zonate, 

 especially near the margin, finely tomentose or villose, isabelline 

 with slightly darker markings; margin thin, undulate, sterile, 

 pallid, usually becoming black as though scorched; context 

 fibrous-corky, white, 1-3.5 mm. thick; tubes short, I mm. or 

 less long, smoky-white to blackish within, mouths regular, 

 angular, 5-6 to a mm., smoke-colored and pruinose when young, 

 soon becoming grayish-black, edges thin, entire; spores ellipsoid- 

 allantoid, 3-5 X 1.5-2.5 /*. 



Extremely common throughout on dead deciduous wood and 

 rarely on that of coniferous trees. 



2. BJERKANDERA FUMOSA (Pers.) P. Karst. 



Pileus cespitose-imbricate, fleshy-corky, firm, dimidiate, con- 

 chate, decurrent, 2-4 X 5-10 X 0.5-2 cm.; surface smooth, 



