382 NORTH AMERICAN FLORA [VoLumE 9 
21. Hydrocybe Davisii (Peck) Murrill. 
Hygrophorus Davisii Peck, Bull. Torrey Club 33: 214, 1906. 
Pileus membranous, fragile, convex, sometimes centrally depressed, gregarious, 1-1.2 
em. broad; surface glabrous, very viscid, olive-brown variegated with olive-green when young 
and fresh, assuming a yellowish-buff color with a faint tint of pink when dried, margin even 
when young, striate when mature: lamellae unequal, decurrent, distant, thin, grayish-white: 
_ spores broadly ellipsoid, hyaline, 6-7 X 4-5 yu: stipe slender, flexuous, fragile, equal or slightly 
tapering upward, glabrous, viscid, grayish-white, becoming brownish, hollow, 2-3 em. long, 
1.5-2 mm. thick. 
TYPE LOCALITY: Stow, Massachusetts. : 
Hasirat: Damp places under ferns in deciduous woods. 
DistrisuTION: Massachusetts. 
22. Hydrocybe immutabilis (Peck) Murrill. 
Hygrophorus immutabilis Peck, Ann. Rep. N. Y. State Mus. 51: 292.- 1898. 
Pileus thin, conic, convex, umbonate, 1.5-2.5 cm. broad; surface greenish-brown or yel- 
lowish-brown, not changing color on drying, margin often striate when dry: lamellae subdistant, 
whitish or yellowish: spores ellipsoid, 10-12 X 6-7 yw: stipe slender, glabrous, yellow, hollow, 
2.5-5 em. long, 3-4 mm. thick. 
TYPE LocaLity: Raybrook, Essex County, New York. 
Hapitat: Rather dry sandy or heathy places. 
DistRIBUTION: New York. 
23. Hydrocybe californica Murrill, sp. nov. 
Pileus conic, cuspidate, gregarious, 5 cm. broad; surface orange or reddish, smooth, gla- 
brous, decidedly viscid, not blackening on drying, margin somewhat lobed, concolorous: 
context very thin; lamellae adnate, yellow or nearly white, rather broad and distant: spores 
ellipsoid, smooth, hyaline, 9-12 X 6-8 yu: stipe thick, equal, concolorous, hollow, smooth, 
glabrous, somewhat viscid, 7~9 cm. long, about 1 cm. thick. 
Type collected under an oak at Berkeley, California, January 20, 1914, L. S. Smith 413 (herb, 
N. Y. Bot. Gard.). 
Hasirat: On the ground under oaks and redwoods. 
DistRiBuTion: California. 
24, Hydrocybe constans Murrill, Mycologia 4: 208. 1912. 
Hygrophorus consians Murrill, Mycologia 4: 217. 1912. 
Pileus convex, slightly umbilicate, gregarious, 1.5 cm. broad; surface glabrous, shining, 
not viscid, uniformly red, unchanging on drying, striate from the margin half way to the 
center; lamellae adnate with a decurrent tooth, rather distant, plane or arcuate, testaceous- 
flavous; spores ellipsoid, smooth, hyaline, 7 X 4; stipe hollow, subequal, smooth, glabrous, 
concolorous above, ochraceous at the base, 7 cm. long, 5 mm. thick. 
TYPE LocaLity: Mill City, Oregon. 
Hapirat: In moss in low woods. 
DistRIsuTION: Known only from the type locality. 
25. Hydrocybe rosea Murrill, Mycologia 3: 197. 1911. 
Hygrophorus roseus Murrill, Mycologia 4: 332. 1912. 
Pileus convex with an umbilicate center, resembling Omphalopsis in shape, solitary, 1 
em. broad, 5 mm. high; surface smooth, glabrous, roseous to incarnate, margin entire or rarely 
lobed, decurved: context very thin, allowing the lamellae to show through on the upper side; 
lamellae decurrent, arcuate, white, stained with red: spores ovoid, smooth, hyaline, 10-13 
X 7-9 w: stipe smooth, cylindric, paler than the pileus below, deep-red at the apex, where it is 
much enlarged, 1.5 cm. long, 1 mm. thick below. 
Tyre LocaLity: Sir John Peak, Jamaica. 
Hasitat: In moss on a decayed log. 
DisTRIBUTION: Known only from the type locality. 
