22 SOUTHERN POLYPORES 



3. POLYPORUS DIBAPHUS Berk. & Curt. 



Pileus circular, regular, convex, 2.5-3X0.05-0.1; surface 

 dark-purple, finely tomentose, becoming glabrous, marked here 

 and there with pale, radiating lines; margin thin, acute, entire, 

 fertile; context white, membranous; tubes decurrent, ochraceous, 

 very short, mouths angular, 4-5 to a mm., edges thin, becoming 

 dentate; stipe central, slender, even, slightly darker, rough, 

 pruinose below, 3 cm. long, 3 mm. thick. 



Collected once on dead wood in Alabama. 



4. POLYPORUS POLYPORUS (Retz.) Murrill 



Pileus circular, convex to plane, slightly umbilicate at times, 

 2-8 X 0.2-0.4 cm.; surface fuliginous, more rarely yellowish- 

 brown, hispid-squamulose to minutely hispid; margin at first 

 inflexed, thin, fimbriate, often becoming wavy or lobed; context 

 milk-white, membranous, 1-3 mm. thick; tubes adnate, white to 

 pallid, 1-2 mm. long, mouths circular, regular, 2-3 to a mm., 

 edges at first thick, becoming thin and often dentate with age; 

 spores cylindric, subcurved, 7-8 X 2-3,11; stipe central, solid, 

 woody, equal, squamulose, avellaneous, not black at the base, 

 2-3 cm. long, 3-7 mm. thick. 



Occasional northward on fallen decayed wood of deciduous 

 trees. 



5. POLYPORUS CONFUSUS Mass. Kew. Bull. 1910: 250. 1910 



Pileus coriaceous, deeply infundibuliform, 5-6 cm. broad; 

 surface glabrous, reddish-brown or gilvous; tubes short, minute, 

 unequal, decurrent, yellowish; spores cylindric-ellipsoid, sub- 

 arcuate at each end, hyaline, 12-14 X 4-5 M; stipe central, straight 

 or curved, about 5 cm. long. 



Described from specimens collected on a fallen dead log near 

 St. Martinsville, Louisiana, by Langlois in 1889, and sent by 

 Ellis to Cooke for determination, who said it was perhaps P. 

 craterellus Berk. & Curt, or near it. 



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6. POLYPORUS ARCULARIELLUS Murrill 



Pileus very thin, circular, umbilicate, 2 X o.i cm.; surface 

 smooth, orange-yellow to brown in the type specimen; margin 

 thin, somewhat irregular, beautifully ciliate; context pallid, 

 membranous, translucent; tubes ochraceous when dry, very 

 short, mouths large, angular, oblong, 2 to a mm., edges thin; 

 stipe central, thicker below, setulose, darker than the pileus, 

 2 cm. long, 2 mm. thick. 



