56 NORTH AMERICAN FLORA [VOLUME 9 
3. Polyporus scabriceps Berk. & Curt. Jour. Linn. Soc. 10: 305. 1868. 
Pileus irregularly circular in outline, slightly convex, 3-5 X 0.3 cm.; surface umbri- 
nous, minutely and evenly scabrous, appearing spuriously porose; margin irregular, invo- 
lute, 3-4 mm. of it being rolled inward: context soft-corky, pale yellowish-brown ; tubes 
decurrent, pallid, dark yellowish-brown when dry, mouths irregular, 4 to a mm., edges 
thin, dentate: spores smooth, hyaline: stipe central, short, even, lighter than the pileus, 
scabrous, tough, 2 cm. long, 5-6 mm. thick. 
TYPE LOCALITY: Cuba, 
HapitatT: Dead wood. 
DISTRIBUTION : Known only from the type locality. 
4, Polyporus virgatus Berk. & Curt. Jour. Linn. Soc. 10: 304. 1868. 
Pileus circular, depressed at the center, 3.5-6 X0.2-0.3 cm.; surface rufous when dry, 
tomentose to glabrous, at length virgate from the rupture of the cuticle; margin thin, 
acute, inflexed when dry: context firm, fibrous, pale-brown, 1-2 mm. thick ; tubes decur- 
rent, fragile, dark yellowish-brown when dry, 1-1.5 mm. long, mouths angular, somewhat 
irregular, 2-3 to a mm., slightly concentrically confluent, edges thin, conspicuously den- 
tate: spores smooth, hyaline: stipe central, nearly equal, concolorous or darker at the 
base, smooth like the pileus, firm and tough, 1.5-2.5 cm. long, 5-10 mm. thick. 
TYPE LOCALITY: Cuba. 
HasitatT: On dead wood. 
DISTRIBUTION : Cuba. 
5. Polyporus delicatus Berk. & Curt. Grevillea 1: 37. 1872. 
Pileus circular, irregular, 1.51.25 X 0.1-0.3 cm. ; surface ochraceous, very smooth, 
evenly tomentose; margin thin, acute, undulate, inflexed: context pallid, soft and elastic ; 
tubes decurrent to the base, concolorous, mouths angular, 2 toamm., pale yellowish-orange 
when dry, dissepiments thin, quite collapsed in the single type specimen: spores not 
examined: stipe central, short, concolorous above, hard, black and radicate below. 
TYPE LOCALITY: Alabama. 
HapitatT: On dead wood. 
DISTRIBUTION : Known only from the type locality. 
6. Polyporus dibaphus Berk. & Curt. Grevillea 1: 36. 1872. 
Pileus circular, regular, convex, 2.5-3 X 0.05-0.1; 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 toa mm., edges thin, becoming dentate: spores not examined: stipe 
central, slender, even, slightly darker, rough, pruinose below, 3 cm. long, 3 mm. thick. 
TYPE LOCALITY: Alabama. 
HasitaT: On dead wood. 
DISTRIBUTION : Known only from the type locality. 
7. Polyporus Polyporus (Retz.) Murrill, Bull. Torrey 
Club 30: 33. 1904. 
Boletus Polyporus Retz. Sv. Vet.-Acad. Handl. 1769: 253. 1769. 
Boletus brumalis Pers. Neues Mag. Bot. 1: 107. 1794. 
Polyporus luridus Berk. & Curt. Grevillea 1: 37. 1872. 
Pileus circular, convex to plane, slightly umbilicate at times, 2-8 X 0.2-0.4cem.; 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, mem- 
branous, 1-3 mm. thick; tubes adnate, white to pallid, 1-2 mm. long, cylindrical, mouths 
circular, regular, 2-3 to a mm., edges at first thick, becoming thin and often dentate with 
age: spores cylindrical, subcurved, hyaline, 7-8 2-34: stipe central, solid, woody, equal, 
squamulose, avellaneous, not black at the base, 2-3 cm. long, 3-7 mm. thick. 
TYPE LOCALITY : Europe. 
HasitaT: Decayed fallen branches, stumps and roots of various deciduous trees. 
DISTRIBUTION : North America and Europe ; more abundant in the northern portions. 
