Part 5, 1916] AGARICACEAE 369 
66. Gymnopus umbonatus (Peck) Murrill. 
Collybia umbonata Peck, Bull. Torrey Club 31: 178. 1904. 
Pileus thin, conic, becoming convex or nearly plane with the margin deflexed, prominently 
umbonate, 2-10 cm. broad; surface glabrous, isabelline to bay-red or chestnut-colored, some- 
times darker at the center than on the margin: lamellae numerous, subdistant, narrowed toward 
the stipe, nearly free, whitish: spores minute, ellipsoid, 6-8 X 4-5 u: stipe rather long, 
glabrous, equal or slightly tapering upward, hollow, radicate, concolorous or a little paler, 
5-30 em. long, 4-12 mm. thick. 
TYPE LocaALity: California. 
Hasrrar: On and about old stumps in woods. 
DistRIBUTION: Washington, Oregon, and California. 
67. Gymnopus badiialbus Murrill, sp.-nov. 
Pileus rather large, somewhat tough, broadly convex to nearly plane, with a distinct, 
conic umbo, gregarious, 3-5 cm. broad; surface smooth, glabrous, moist but not viscid, bay, 
margin entire, incurved when young: lamellae adnate, very much crowded, narrow, white: 
spores globose, smooth, hyaline, minute, about 4: stipe rather short and thick, enlarged 
below, smooth, glabrous, pallid, hollow, inclined to be somewhat fleshy, 4-5 cm. long, 5-8 mm. 
thick. 
Type collected on a much decayed log in woods near Seattle, Washington, October 20-Novem- 
ber 1, 1911, W. A. Murrill 611 (herb. N. Y. Bot. Gard.). 
DISTRIBUTION: Known only from the type locality. 
68. Gymnopus avellaneidiscus Murrill, sp. nov. 
Pileus rather tough, convex to expanded, cespitose, reaching 3.5 cm. broad; surface dry, 
smooth, glabrous, pale-fulvous, avellaneous on the rounded umbo: lamellae adnate, very much 
crowded, rather narrow, subventricose, white: spores globose, smooth, hyaline, 6-7 yw: stipe 
short, often compressed, smooth, subglabrous, pallid, 2-2.5 em. long, 3-4 mm. thick. 
Type collected in rich soil in woods near Seattle, Washington, October 20~November 1, 1911, 
W. A. Murrill 438 (herb. N. Y. Bot. Gard.). 
DISTRIBUTION: Known only from the type locality. 
69. Gymnopus sublatericius Murrill, sp. nov. 
Pileus rather tough, nearly plane, not umbonate, solitary, 2-3 cm. broad; surface dry, 
glabrous, uneven, pale-latericeous or subfulvous: lamellae adnate with a slight decurrent 
tooth, cream-colored, crowded: spores subglobose, slightly apiculate at one end, smooth, 
hyaline, 6-7 » long: stipe smooth, glabrous, concolorous, cylindric, cartilaginous, hollow, 
4 cm. long, 4 mm. thick. 
Type collected in woods at Glen Brook, Oregon, November 7, 1911, W. A, Murrill 773 (herb. 
N. Y. Bot. Gard.). : . 
DIstRiBvution: Known only from the type locality. 
70. Gymnopus fulvipes Murrill, sp. nov. 
Pileus convex to expanded, rather thin and tough, usually solitary, 1-3 em. broad; surface 
moist but not viscid, smooth, glabrous, fulvous-ferruginous to latericeous, margin entire, 
concolorous or slightly paler, inflexed when young: lamellae adnate, distant, of medium 
breadth, interveined, white: stipe long, slender, equal or slightly tapering upward, cartilagin- 
ous, hollow, fulvous-ferruginous or pale-bay, clothed for its entire length with a fulvous 
tomentum, which is scanty at the apex and increases toward the base, 6-8 cm. long, 2-5 mm. 
thick. 
Type collected among humus on the ground in coniferous woods at Mill City, Oregon, November 
9, 1911, W. A. Murrill 808 (herb. N. Y. Bot. Gard.). . 
DISTRIBUTION: Washington, Oregon, and California. 
71. Gymnopus avellaneigriseus Murrill, sp. nov. 
_ Pileus rather small, convex, broadly umbonate, gregarious, 2-2.5 cm. broad; surface 
smooth, glabrous, shining, avellaneous, margin concolorous, entire, incurved when young: 
