58 NORTH AMERICAN FLORA [VoLUME 9 
spores globose, somewhat flattened, smooth, hyaline, 5-6: stipe short, thick, smooth, 
glabrous, white, not blackening, often obsolete, 1-2 cm. long, 3 cm. thick. 
TYPE LOCALITY: Riverside, Maine. 
HaBitatT: Decayed trunks of apple trees. 
DISTRIBUTION : Maine and Connecticut. 
13. Polyporus phaeoxanthus Berk. & Mont.; Mont. 
Syll. Crypt. 154. 1856. 
Pileus convex, subhemispherical, 2.5 < 0.5 cm.; surface smooth, glabrous, bay-brown ; 
margin acute, straight, slightly undulate: context fleshy, Iuteous, rigid, friable and 
much shrunken when dry, 1-2 mm. thick; tubes remote, minute, very short, 0.5 mm. or 
less in length, mouths irregular, 6-8 to a mm., edges thick (specimen young), obtuse, 
luteous: spores not examined: stipe central, cylindrical, solid, fleshy, concolorous, floc- 
cose at the base, 4 cm. long, 3 mm. thick. 
TYPE LOCALITY : Columbus, Ohio. 
Hasitat: Fallen oak wood. 
DISTRIBUTION: Known only from the type locality. 
14. Polyporus columbiensis Berk. Lond. Jour. Bot. 1: 454. 1842. 
Pileus circular, very thin, subinfundibuliform 2.50.05 cm.; surface brown, very 
smooth and glabrous, resembling parchment or the skin of an apple; margin thin, acute, 
straight, undulate: context pallid, membranous; tubes decurrent, very short, dark-brown 
in the type specimens, mouths minute, angular, 5 toa mm., edges thin, acute: spores not 
examined: stipe central, slender, concolorous, finely velvety, tough and fibrous, 1-5 cm. 
long, 3 mm. thick. 
TYPE LOCALITY: Columbia river, South Carolina. 
Hasitat: On dead wood. 
DISTRIBUTION : South Carolina. 
15. Polyporus obolus Ellis & Macbr.; Ellis & Ev. Bull. Lab. Nat. 
Hist. Univ. Iowa 4: 68. 1896. 
A small plant with very thin, partially translucent, pileus, brown central stipe and 
exceedingly minute pores. Pileus circular, plane, 1.5-2.5 x 0,.03-0.08 cm.; surface minutely 
tomentose, radiate-rugose, isabelline, fulvous at the center; margin straight or repand, 
even, glabrous, entirely devoid of teeth or cilia: context 0.2-0.7 mm. thick, tough, white, 
translucent, especially near the margin; tubes 0.1 mm. long, 8 toa mm., adnate, white, 
cylindrical, regular, edges thick, entire: spores ovoid, smooth, hyaline, 3.5-44.5-5z: 
stipe central, tough, elastic, slender, equal, chestnut-colored, glabrous, smooth, much 
compressed in drying, 2-4 cm. long, 1-2 mm. thick. 
TYPE LOCALITY: Nicaragua, 
HasitaT: On dead wood. 
DISTRIBUTION : Known only from the type locality. 
16. Polyporus albiceps Peck, Bull. Torrey Club 27: 19. 1900. 
Pileus tough, circular, plane or slightly depressed, 2.5-5 cm. broad, 5-10 mm. thick ; 
surface dry, glabrous, opaque, smooth, white; margin thin, entire, concolorous: context 
white, homogeneous, 4-8 mm. thick; tubes decurrent, 1 mm. long, white within, mouths 
scarcely visible to the unaided eye, subcircular, edges thin, white, dentate: spores not 
examined: stipe central, cylindrical, even, 2.5-4 cm. long, 6-8 mm. thick, resembling the 
pileus in surface and substance. 
TYPE LOCALITY: Sea beach, New Hampshire. 
Hasitat: Decaying buried wood under walnut trees. 
DISTRIBUTION : Known only from the type locality. 
17. Polyporus humilis Peck, Ann. Rep. N. Y. State 
Mus. 26: 69. 1874. 
Pileus spatulate, suborbicular or reniform, 1 2-2.5X0.1-0.3 cm.: surface white, 
soft, elastic, subglabrous, azonate; margin sterile, concolorous, entire, acute, inflexed when 
