Part 5, 1916] AGARICACEAE 359 
21. Gymnopus subsulphureus (Peck) Murrill. 
Collybia subsulphurea Peck, Bull. Torrey Club 34: 345, 1907. 
Pileus fleshy but thin, somewhat tough, reviving under the influence of moisture, broadly 
convex, often becoming centrally depressed, cespitose, 2.5-6 cm. broad; surface glabrous, 
sulfur-yellow, sometimes tinged with pink or pale-tan-color at the center: context hygrophan- 
ous, white when dry, the odor strong, fungoid; lamellae thin, narrow, crowded, rounded 
behind, adnexed or nearly free, pale-sulfur-colored or whitish: spores ellipsoid, 6 X 3 uw: stipe 
rather long, tough, glabrous, hollow, tapering downward, smooth when moist, striate-sulcate 
when dry, sulfur-colored or pallid, 5-12 cm. long, 2-6 mm. thick. 
TYPE LOCALITY: Stockton, Kansas. 
Hasirat: Among fallen leaves under oak trees. 
DISTRIBUTION: Known only from the type locality. 
22. Gymmnopus cremoraceus (Peck) Murrill. 
Agaricus (Collybia) cremoraceus Peck, Ann. Rep. N. Y. State Mus. 32: 26. 1880. 
Agaricus (Collybia) esculentoides Peck, Ann. Rep. N. Y. State Mus. 39:39. 1887. 
Collybia ochroleuca Peck, Ann. Rep. N. Y. State Mus. 46: 104 (24). 1893. 
Pileus thin, submembranous, hemispheric or convex, wmbilicate or centrally depressed, 
1.5-2.5 cm. broad; surface glabrous, dry, subsilky, pale-ochraceous, margip sometimes wavy: 
context white, the taste bitter; lamellae broad, subdistant, emarginate, with a decurrent tooth, 
whitish: spores ellipsoid, 6-7.5 X 5 yw: stipe glabrous, concolorous, slender, equal, stuffed or 
hollow, 2.5-5 cm. long, 2-4 mm. thick. 
TYPE LocaLity: Shokan, New York. 
HasiTatT: On the ground in sandy soil in woods. 
DISTRIBUTION: New York. 
23. Gymnopus exsculptus (Fries) Murrill. 
Agaricus exsculptus Fries, Epicr. Myc. 1: 93. 1838. 
?Agaricus (Collybia) luteo-olivaceus Berk. & Curt. Ann. Mag. Nat. Hist. III. 4: 286. 1859. 
Agaricus (Collybia) coloreus Peck, Bull. Buffalo Soc. Nat. Sci. 1:46. 1873. 
Collybia exsculpta P. Karst. Bidr. Finl. Nat. Folk 32: 156. 1879. 
Agaricus (Tricholoma) rubescentifolius Peck, Ann. Rep. N. Y. State Mus. 39:38. 1887. 
Pileus thin, convex or nearly plane, obtuse or subumbilicate, scattered or subcespitose, 
1.2-3.5 em. broad; surface subglabrous, hygrophanous, yellow or yellow tinged with red or 
brown becoming smoky-flavid, margin usually projecting: lamellae crowded, narrow, emar- 
ginate, adnexed, yellow or yellowish, changing to brownish-red in drying: spores subglobose or 
broadly ellipsoid, 4-5 uw: stipe equal, hollow, glabrous, sometimes slightly fibrillose or pruinose 
at the apex, concolorous, 2.5—5 cm. long, 2-4 mm. thick. 
TYPE LOCALITY: Europe. 
Haprrat: On decaying wood, especially of hemlock and pine. 
DISTRIBUTION: Maine to Washington and south to North Carolina and Ohio; also in Europe. 
ILLUSTRATIONS: Cooke, Brit. Fungi pl. 268; Fries, Ic. Myce. 1: pl. 66, f. 3. 
24. Gymnopus chrysopeplus (Berk. & Curt.) Murrill. 
Lentinus chrysopeplus Berk. & Curt. Jour. Linn. Soc. 10: 301. 1868. 
Agaricus scabriusculus Peck, Ann. Rep. N. Y. State Cab. 23: 85. 1872. 
Agaricus (Tricholoma) lacunosus Peck, Bull. Buffalo Soc. Nat. Sci. 1:43. 1873. 
Omphalia scabriuscula Sacc. Syll. Fung. 5: 336. 1887. 
Collybia lacunosa Peck, Ann. Rep. N. Y. State Mus. 44: 176 (64). 1891. 
Pileus thin, broadly convex or expanded, 1.5-3 cm. broad; surface floccose-pulverulent, 
yellow, dry, shining, margin striate: lamellae usually adnate, rarely short-decurrent, inter- 
veined, distant, broad, white or pale-yellow: stipe equal or attenuate below, firm, minutely 
squamulose, concolorous, solid or stuffed, 3.5-5 cm. long, 2 mm. thick. 
‘Type Locality: Cuba. 
Hasirat: On dead wood. 7 . 
DIstRIBUTION: New England to Wisconsin and southward to Cuba; perhaps also in Brazil, 
Port Natal, and New Caledonia. 
25. Gymnopus subflavifolius Murrill, sp. nov. 
Pileus convex to expanded, becoming slightly depressed, rather thin, solitary, 6-7 cm. 
broad; surface smooth, glabrous, dry, ochroleucous to ochraceous, becoming striate and 
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