Part 1, 1907] POLYPORACEAEK 35 
X 3-6 X 0.5-1.5 cm.; surface sodden, tomentose or villose-tomentose, azonate,, murinous or 
griseous when fresh, becoming caesious or fading to nearly pure-white on drying, often 
nearly glabrous with age: context white, homogeneous, soft, friable, 5-8 mm. thick; tubes 
long and slender, 5-10 mm. long, caesious within, collapsing, friable, mouths angular, 3-4 
to a mm., edges white or bluish-gray, very thin, dentate to long and sharply lacerate: 
spores elongate, smooth, hyaline, 5-5.5 1.5 4. 
TYPE LOCALITY: Germany. 
HaBITAT: Dead deciduous and coniferous wood. 
DISTRIBUTION: Canada to Tennessee ; also in Europe. 
ILLUSTRATION : Sow. Joc. cit. 
17. Tyromyces semipileatus (Peck) Murrill. 
Polyporus semipileatus Peck, Ann. Rep. N. Y. State Mus. 34: 43. 1881. 
- Pileus effused, largely resupinate, suborbicular or laterally elongate, very narrowly 
reflexed, the reflexed portion 0-1 X 2-5 X 0.3-0.5 cm.; surface white or pale-isabelline, 
subvillose or scabrous, azonate; margin thin, undulate, sometimes inflexed: context white, 
fleshy-tough to fragile, 2-4 mm. thick; tubes short, slender, white to yellowish within, 
mouths minute, circular to slightly angular, scarcely conspicuous, 7 toa mm., edges thin, 
very even, entire, white to pallid, often bluish-discolored in spots or blotches: spores 
smooth, hyaline, subglobose, 6-8; hyphae 7-8; cystidia none. 
TYPE LOCALITY: Catskill Mountains, New York. 
HABITAT: Dead branches of deciduous trees. 
DISTRIBUTION: Eastern United States, Maine to Florida. 
18. Tyromyces chioneus (Fries) Karst. Rev. Myc. 3°: 17. 1881. 
Polyporus chioneus Fries, Obs. Myc. 1: 125. 1815. . 
Polyporus albellus Peck, Ann. Rep. N, Y. State Mus. 30: 45. 1878. (Type from the Helderberg 
Mountains, New York.) 
Pileus imbricate, sessile, dimidiate, convex, 2-4 3-6 X 1 cm.; surface sodden, grayish- 
cinereous or yellowish-white, azonate, smooth, pubescent to glabrous, acute but rather 
thick, entire, concolorous, fertile: context sodden and watery when fresh, with a mild flavor 
and acid odor, white, homogeneous and fragile when dry, cutting with a smooth surface, 
7-10 mm. thick; tubes shorter than the thickness of the context, 2-4 mm. long, white to 
yellowish within, fragile, mouths even, glistening, angular, sinuous at times, 4 to a mm., 
white to ochraceous, edges thin, fimbriate-dentate: spores smooth, hyaline, cylindrical, 
curved, thin-walled, 4-5 x 1-2 4; cystidia none. 
TYPE LOCALITY: Sweden: 
HasgiTaT: Branches and trunks of birch and other deciduous trees. 
DISTRIBUTION : Eastern Canada to South Carolina and west to Wisconsin; also in Europe. 
19. Tyromyces Bartholomaei (Peck) Murrill. 
Polyporus Bartholomaei Peck, Bull. Torrey Club 23: 418. 1896. 
Pileus thin, fleshy-tough, rather soft,,obovate, attached by a flattened stem-like base, 
3X 3.5 X0.2 cm.; surface azonate, white, opaque, finely spongy-tomentose; margin thin, 
broadly sterile, subentire: context white to pallid, 1-1.5 mm. thick, soft and somewhat 
spongy, very fragile when dry; tubes decurrent, less than 1 mm. long, white, mouths 
small, circular, angular, 4-5 to a mm., regular, edges entire to fimbriate-dentate: spores 
not examined. 
TYPE LOCALITY: Rockport, Kansas. 
HapitaT: Decaying sticks and chips on damp ground. 
DISTRIBUTION : Known only from the type locality. 
20. Tyromyces anceps (Peck) Murrill. 
Polyporus anceps Peck, Bull. Torrey Club 22: 207. 1895. 
Pileus effused, resupinate or narrowly reflexed, inseparable from the matrix, firm, sub- 
corky, slightly flexible, rigid when dry, the reflexed portion 1-2 cm. long, extending later- 
ally for several centimeters by confluence, about 1 cm. thick behind; surface minutely 
downy, sometimes rugosely pitted, milk-white or slightly discolored, azonate; margin 
