ParT 1, 1907] POLYPORACEAE 59 
dry: context less than 1 mm. thick, spongy, white, somewhat fragile when dry; tubes 
1-1.5 mm. long, white, mouths angular, regular, even, 5 toa mm., edges glistening, thin, 
white to pallid, slightly dentate: spores smooth, hyaline: stipe lateral, compressed or 
cylindrical, 2.5-5 & 0.3-0.6 cm., resembling the pileus in surface and substance. 
TYPE LOCALITY : Sterling, New York. 
HapitaT: Half buried sticks and branches in open woods. 
DISTRIBUTION: New York. : 
18. Polyporus aemulans Berk. & Curt. Jour. Linn. Soc. 10: 304. 1868. 
Pileus thin, circular, umbilicate, 3.5-4  0.05-0.1 cm. ; surface radiate-striate, ochrace- 
ous, dark yellowish-brown when dry, glabrous at maturity; margin thin, straight, subcin- 
ereous, finely hispid, irregularly incised or lobed, sterile for 1-2 mm.: context tough, mem- 
branous, pallid to pale-brown; tubes decurrent, yellowish, less than 1 mm. long, gradually 
disappearing near the margin, mouths alveolar, shallow, 2 to a mm., usually radially elon- 
gate, edges acute, becoming somewhat elongate: spores not examined: stipe central, 
equal, coffee-colored, pulverulent, expanding into the pileus, 2 cm. long, 3-4 mm. thick. 
TYPE LOCALITY: Cuba. 
HagitaT: Dead wood. 
DISTRIBUTION : Known only from the type locality. 
19. Polyporus arculariellus Murrill, Bull. Torrey Club 31: 36. 1904. 
Favolus Curtisit Berk. Grevillea 1: 68. 1872. 
Pileus very thin, circular, umbilicate, 20.1 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: spores not examined: stipe central, thicker 
below, setulose, darker than the pileus, 2 cm. long, 2 mm. thick. 
TYPE LOCALITY : North Carolina. 
Hapitat: On dead wood. 
DISTRIBUTION : Known only from the type locality. 
20. Polyporus arculariformis Murrill, Torreya 4: 151. 1904. 
Pileus circular, umbilicate, 0.6-0.8 X 0.05-0.1 cm.; surface regularly concentrically 
rugose about the white, depressed center, isabelline to avellaneous, slightly imbricate-fibril- 
lose; margin thin, acute, soon deflexed, nearly white, changing to isabelline, beset with 
numerous long, white, pointed cilia: context membranous, white, perfectly opaque; tubes 
0.2-0.4 mm. long, 2-3 to a mm., radially elongate, decurrent, pallid, edges thin, irregu- 
larly toothed and fimbriate: spores hyaline, smooth, thin-walled, 2-2.5 7-8: stipe 
central, stuffed, equal, concolorous, beset with sharp bristles which partially disappear with 
age, densely tomentose at the base, 1.5-2 cm. long, 0.5-1 mm. thick. 
TYPE LOCALITY: Unaka Springs, Tennessee. 
HaBitTat: Dead fallen branches in woods. 
DISTRIBUTION : Known only from the type locality. 
ILLUSTRATION: Murrill, Torreya loc. cid. 
21. Polyporus arcularius (Batsch) Fries, Syst. Myc. 1: 342. 1821. 
Boletus arcularius Batsch, Elench. Fung. 97. 1783. 
Boletus exasperatus Schrad. Spic. Fl. Germ. 153. 1794. 
Pilens circular, convex, umbilicate, 1-2.5 X 0.1-0.2 cm. ; surface azonate, concentrically 
rugose when dry, fuscous-squamulose to fulvous and nearly glabrous; margin acute, ciliate- 
dentate, straight, inflexed in drying: context white, membranous; tubes slightly decurrent, 
rather firm, white to brownish, 1-2 mm. long, mouths large, oblong-rhomboid, 1-2 to a 
mm., edges thin, elongate, denticulate: spores cylindrical, pointed at the ends, smooth, 
thin-walled, 2-guttulate, copious, 1.5-2.5X 7-8: stipe central, slender, even, fuscous-gray 
to fulvous, subsquamulose to glabrous above, hispid-tomentose at the base, 2-4 cm. long, 
2-3 mm. thick. 
TYPE LOCALITY: Germany. 
HABITAT: Decaying wood of a variety of trees. 
DISTRIBUTION: Connecticut to Florida and west to Colorado and Mexico ; also in Europe. 
ILLUSTRATION: Micheli, Nov. Pl. Gen. p/. 70, f. 5. 
ExsiccaT1: Rav. Fungi Car.1: 9; Ellis & Ev. N. Am. Fungi 1690 ; Rav. Fungi Am. 209. 
