PaRT 5, 1916] AGARICACEAE 329 
36. Prunulus avellaneus Murrill, sp. nov. 
Pileus campanulate to convex, not umbonate, densely cespitose, 1-1.5 em. broad; surface 
smooth, dry, glabrous, striate, avellaneous: lamellae adnate, distant, broad, white, ventricose 
in front, notched on the edges: spores broadly ellipsoid, smooth, hyaline, 7~8.5 X 6-7 u: 
stipe tough, hollow, smooth, glabrous, avellaneous, paler at the apex, equal or slightly en- 
‘larged toward the base, 3 em. long, 2 mm. thick. 
Type collected on a dead balsam fir log in woods at Lake Placid, Adirondack Mountains, New 
York, July 17-29, 1912, W. A. & Edna L. Murrill 86 (herb. N. Y. Bot. Gard.). 
DISTRIBUTION: Known only from the type locality. 
37. Prunulus curvipes (Peck) Murrill. 
Omphalia curvipes Peck, Bull. Torrey Club 34: 345. 1907. 
Pileus submembranous, convex, umbilicate, cespitose, 6-10 mm. broad; surface glabrous, 
moist, brown, grayish-brown, or dark-gray, sometimes paler at the center when dry, margin 
sometimes obscurely striate, incurved: lamellae thin, rather crowded, arcuate, adnate or slightly 
decurrent, white or whitish: spores minute, 4 X 2 u: stipe short, curved, stuffed or hollow, 
white or whitish, slightly thickened and distinctly whitish-villose at the base, 1.5-2.5 cm. long, 
1-2 mm. thick. 
TYPE LOCALITY: Ontario, Canada. 
Hasitat: On decaying wood of maple and certain other trees. 
DISTRIBUTION: Eastern Canada and New York. 
38. Prunulus atribrunneus Murrill, sp. nov. 
Pileus campanulate to convex, subumbonate, gregarious, 1-1.5 cm. broad; surface dry, 
glabrous, dark-brown, margin subconcolorous, entire, not striate: lamellae adnexed, nearly 
free, crowded, rather broad near the margin, undulate on the edges, white: spores subglobose, 
smooth, hyaline, 5-6 uw: stipe cylindric, filiform, dry, smooth, glabrous, white, hollow, 3-4 cm. 
long, 1 mm. thick. 
Type collected on an old stump in the New York Botanical Garden, July 6, 1902, F. S. Earle 
196 (herb. N. Y. Bot. Gard.). 
DISTRIBUTION: Known only from the type locality. 
39, Prunulus hemisphaericus (Peck) Murrill. 
Mycena hemisphaerica Peck, Ann. Rep. N. Y. State Mus. 46: 104 (24), 1893. 
Pileus thin, firm, hemispheric, gregarious or subcespitose, 1-1.5 cm. broad; surface glab- 
rous, hygrophanous, brown when moist, gray when dry, margin striatulate when moist: lamellae 
adnate, subdistant, arcuate, whitish-livid: spores ellipsoid, 4-5 XK 3 yu: stipe glabrous, livid- 
white, hollow, 2.5-3 em. long, 2-2.5 mm. thick. 
TyPE Locality: Fulton Chain, New York. 
Haszrrat: On mossy prostrate trunks of trees in woods. 
DISTRIBUTION: New York. 
40. Prunulus vexans (Peck) Murrill. 
Mycena vexans Peck, Ann, Rep. N. Y.:‘State Mus. 38: 85. 1885. 
Pileus conic-campanulate or convex, membranous, solitary or gregarious, not cespitose, 
1-1.5 cm. broad; surface subpruinose, blackish-brown, margin distantly striate: lamellae 
slightly interveined, adnate or uncinate-adnate, subdistant, ascending, white, becoming gray, 
paler on the edges: spores 7.5~8 X 5-6.5 yw: stipe slender, tough, glabrous, concolorous, hollow, 
often floccose-villose at the base, 5-6.5 em. long, 2.5 mm. thick. 
Tyres Locauity: Adirondack Mountains, New York. 
Hasirat: On the ground in woods. : 
DistTRIBUTION: Known only from the type locality. 
41. Prunulus atroalboides (Peck) Murrill. 
Agaricus (Mycena) atroalboides Peck, Ann. Rep. N. Y. State Mus. 27: 93. 1875. 
Mycena atroalboides Sacc. Syll. Fung. 5: 276, 1887. 
Pileus campanulate, obtuse or subumbonate, 8-12 mm. broad; surface at first blackish- 
brown with a slight pruinosity, then fading to cinereous on the margin, which is striate: lamellae 
