334 NORTH AMERICAN FLORA [VoLuME 9 
61. Prunulus rugosoides (Peck) Murrill. 
Mycena rugosoides Peck, Bull. N. Y. State Mus. 67: 22. 1903. 
Pileus fleshy but thin, campanulate, usually broadly umbonate, gregarious, 12-24 mm. 
broad; surface glabrous, hygropbanous, white, cinereous, or blackish-brown, paler when dry, 
margin striate and even when moist, uneven with irregular radiating rugae when dry: lamellae 
adnexed, rounded behind, subdistant, whitish or smoky-white: spores ellipsoid, 7.5 X 5p: 
stipe long, radicate, even, glabrous, white or pallid, often tinged with reddish-brown below, 
hollow, the base villose-tomentose, 4-8 cm. long, 1-3 mm. thick. 
TyPE LocaLity: North Elba, New York. 
Hasitat: On mossy, rotten, coniferous logs. 
DISTRIBUTION: Known only from the type locality. 
InLustRaTIons: Ann. Rep. N. Y. State Mus. 67: pl. M, f. 17-34. 
62. Prunulus rutilantiformis Murrill. 
Mycena denticulata Peck, Bull. Torrey Club 32:77. 1905. Not Prunulus denticulatus S. F. Gray, 
1821. 
Pileus thin, subcampanulate or convex, obtuse, 12-20 mm. broad; surface glabrous, the 
cuticle separable, gray tinged with brown: lamellae decurrent with a tooth, subdistant, rather 
broad, denticulate, pale-brown, purplish on the edges: spores ellipsoid, 7-8 X 4-5 u: stipe 
slender, straight, equal, glabrous, whitish or yellowish, hollow, 5-7 cm. long, 1-2 mm. thick. 
TYPE LOCALITY: St. Louis, Missouri. 
DIsTRIBUTION: Known only from the type locality. 
Bi 63. Prunulus tenuiculus Murrill, sp. nov. 
Pileus broadly campanulate, not umbonate, very thin, gregarious to subcespitose, 1-2 cm. 
broad; surface subglabrous, not shining, gray, slightly rosy-isabelline on the disk, margin 
concolorous, entire, deeply striate: lamellae adnate, distant, arcuate, pale-whitish: spores 
broadly ellipsoid, smooth, hyaline, 7-8 X 5-6 u: stipe slender, equal, glabrous, pale-fuscous, 
whitish and pruinose at the apex, 3-4 cm. long, 1 mm. thick. 
‘Type collected on a fallen, dead, deciduous branch at Redding, Connecticut, July 24, 1902, 
L. M. Underwood & F. S. Earle 692 (herb. N. Y. Bot. Gard.). 
DISTRIBUTION: Known only from the type locality. 
64. Prunulus subtenuipes Murrill, sp. nov. 
Pileus thin, convex to subexpanded, slightly umbonate, cespitose, 1.5-2 cm. broad; 
surface dry, glabrous, striate, fuliginous when young, avellaneous at maturity, the umbo 
remaining fuliginous, margin entire, pallid: lamellae adnate, rather broad, distant, grayish- 
white: spores ellipsoid, smooth, hyaline, 7-8 X 4-5 yw: stipe very slender, cylindric, equal, 
concolorous, smooth, glabrous, whitish-mycelioid at the base, 4 cm. long, 1-2 mm. thick. 
; Type collected on dead coniferous wood on the north shore of Sebec Lake, Piscataquis County, 
Maine, September 16, 17, 1905, W. A. Murrill 2600 (herb. N. Y. Bot. Gard.). 
DISTRIBUTION: Known only from the type locality. 
65. Prunulus atridiscus Murrill, sp. nov. 
Pileus broadly convex, solitary, 2 cm. broad; surface dry, cinereous, darker on the disk, 
the pellicle of compacted fibrils which split radially; margin whitish, eroded with age: lamellae 
broadly sinuate, rather distant, narrow behind, broad and ventricose in front, whitish: spores 
ellipsoid, smooth, hyaline, 6-7 X 4-5 yu: stipe cylindric, smooth, glabrous, concolorous, hollow, 
white and pruinose at the apex, 5-6 cm. long, 1-2 mm. thick. 
Type collected on decayed wood at Edgewater, Ne t 
& W.A. Murrill 1418 (herb. N. ¥. Bot. Gard). Ug ee ae erga ecco rane 
DistRiBuTION: Known only from the type locality. 
66. Prunulus semivestipes (Peck) Murrill. 
Omphalia semivestipes Peck, Bull. Torrey Club 22: 200. 1895. 
Pileus very thin, convex or subcampanulate, 1.5~2.5 cm. broad ; surface glabrous, grayish- 
brown when dry, paler when fresh: lamellae arcuate, adnate or slightly decurrent, distant, 
