Part 6, 1916] AGARICACEAE 377 
II. SPECIES OCCURRING ON THE Pacific coast 
Pileus cuspidate. 
Pileus blackening on drying. 10. H. conica. 
Pileus not blackening on drying. 23. H. californica. 
Pileus convex or slightly umbilicate. ; 
Pileus 1.5 cm. broad, the color persistently red. 24. H. constans. 
Pileus 2.5 cm. broad, fading to yellow. 17. H. miniata. 
Til. Species OCCURRING IN TROPICAL, NortTH AMERICA 
Pileus small, not exceeding 1.5 em. broad. 
Stipe 1.5—2.5 em. long. 
Lamellae decurrent. 25, H. rosea. 
Lamellae adnate or adnexed. 
Pileus luteous with faint traces of red; stipe citrinous. 26. H. flavolutea. 
Pileus aurantiacous; stipe concolorous. 27. H. aurantia. 
Stipe 3-4 cm. long; lamellae decurrent. 
Pileus luteous. 28. H. hondurensis. 
Pileus miniatous. 29. H. subminiata, 
Pileus ferruginous. 30. H. trojana. 
Pileus medium to large, usually 2-5 cm. broad, rarely smaller in H. laeta and 
Ht. flammea. 
Pileus distinctly umbonate. 
Pileus blackening on drying. 10. H. conica. 
Pileus not blackening on drying. 31. H. subfiavida. 
Pileus convex to plane or depressed. 
Pileus pale-reddish-yellow; stipe pale-yellow; spores globose. 32. H. Earlei: 
Pileus ruber to miniatous; stipe luteous or paler. 33. H. subcaespitosa. 
Pileus incarnate, not fading, rarely varying to white or pale-fuliginous; 
stipe fulvous. 15. H. laeta. 
Pileus scarlet, soon fading. 
Spores 8-9 X 4-6 py. 18. H. fammea. 
Spores 18 X 104. 34, H. bella. 
1. Hydrocybe pusilla (Peck) Murrill. 
Hygrophorus pusillus Peck, Bull. Torrey Club 29:69. 1902. 
Pileus thin, convex, 1-2 em. broad; surface subviscid, glabrous, white: context having a 
pleasant, anise-like odor; lamellae decurrent, subdistant, arcuate, white: spores 4-6 uw long: 
stipe short, glabrous, white, hollow, whitish-mycelioid at the base, 2-2.5 cm. long, 1-2 mm. 
thick. 
Tyree LocaLity: Moscow Mountains, Idaho. 
Hasrrat: On the ground in dense woods. : 
Distrisurion: Known only from the type locality. 
2. Hydrocybe nivea (Scop.) Murrill. 
Agaricus niveus Scop. Fl. Carn. ed. 2. 2: 430. vig 
Hygrophorus niveus Fries, Epicr. Myc. 327. 183 
Camarophyllus niveus P. Karst. Bidr. Finl. Nat. Polk 32: 232, 1879. 
Pileus submembranous, rather tough, campanulate to convex, umbilicate, scarcely 2.5 
cm. broad; surface glabrous, viscid, striate, snow-white: lamellae decurrent, narrow, arcuate, 
distant, white: spores smooth, hyaline, 6-8 X 4-5: stipe slender, equal, hollow, smooth, 
glabrous, white, 5 cm. long, 2-4 mm. thick. 
TYPE LOCALITY: Carniola. 
Hasrrat: Among mosses in low ground. 
DistrrBution: New England to Wisconsin and south to New Jersey; also in Europe. 
ILLUSTRATION: L. Dufour, Atl. Champ. pl. 19, f. 42. 
3. Hydrocybe pura (Peck) Murrill. 
Hygrophorus purus Peck, Ann. Rep. N. Y. State Mus. 26:63. 1874. 
Pileus fragile, often irregular, conic to expanded and cupulate from the recurving of the 
thin margin, 2.5-5 cm. broad; surface pure-white, very viscid: lamellae emarginate with a 
decurrent tooth, subdistant, broad, ventricose, pure-white: spores 8 X 5 yw: stipe subflexuous, 
glabrous, very viscid, pure-white, hollow, 8-15 cm. long, 4~7 mm. thick. 
TyPE LocaLity: Croghan, New York. 
Hasirar: On the ground in open woods. 
Distrreution: Known only from the type locality. 
