Part 5, 1916] AGARICACHAE 345 
Omphalina buccinalis (Batsch) Murrill. 
Agaricus buccinalis Batsch, Elench. Fung. Contin. 2: 85. 1789. 
Agaricus scyphoides Fries, Syst. Myc. 1: 163. 1821. 
Omphalia scyphoides Quél. Champ. Jura Vosg. 64. 1872. 
Ombphalina scyphoides Quél. Ench. Fung. 42. 1886. 
Pileus submembranous, plane and umbilicate or infundibuliform, often irregular or some- 
what eccentric, gregarious, 4-8 mm. broad; surface even, silky, white: lamellae narrow, close, 
decurrent, white: spores ellipsoid, 6 X 4-5 u: stipe white, subvillose, short, stuffed, 8-16 mm. 
long. : 
Type Locatity: Europe. 
Hapirat: On the ground in mossy, grassy, or weedy places. 
DisTRIBUTION: New England to Alabama in the eastern United States; also in Europe. 
ILLUSTRATION: Fries, Ic. Myc. pl. 75, f. 2. 
2. Omphalina eximia (Peck) Murrill. 
Omphalia eximia Peck, Bull. Torrey Club 25: 370. 1898. 
Pileus thin, infundibuliform or deeply umbilicate, 1-3.5 em. broad; surface glabrous, white, 
becoming grayish-white on drying, margin thin, spreading or deflexedy lamellae very decur- 
rent, subdistant, narrow, white: spores subglobose, 4-5 uw: stipe glabrous, white, slender, 
equal or slightly enlarged above, hollow, 2.5—5 cm. long, 2-3 mm. thick. 
TYPE Locauiry: Alabama. 
Hasirat: On decaying wood. 
DisTRIBUTION: Known only from the type locality. 
3. Omphalina umbellifera (L.) Quél. Ench. Fung. 44. 1886. 
Agaricus umbelliferus L. Sp. Pl. 1175. 1753. 
Omphalia luteola Peck, Bull. Torrey Club 23: 411. 1896. 
Omphalia sphagnophila Peck, Harriman Alaska Exp. ne ae 5:47. 1904, 
Ompbhalia vestita Peck, Bull. Torrey Club 34: 345. 1907 
Pileus convex or nearly plane, somewhat obconic, 8-16 mm. broad; surface hygrophanous, 
radiate-striate when moist, whitish, pale-yellow, or yellowish-brown: lamellae broad, distant, 
somewhat triangular, white: spores ovoid, 8-11 X 5-7 uw: stipe short, stuffed, becoming hollow, 
12-20 mm. long, 1 mm. thick. 
TYPE LOCALITY: Europe. 
HasirTar: On the ground among mosses or on decaying wood. 
DistRiBuTion: Greenland to Alaska, British Columbia, and Washington, and southward along 
the Alleghanies to North Carolina; also in Europe. 
ILLUSTRATION: Cooke, Brit. Fungi pl. 271 (260). 
4. Omphalina subcartilaginea Murrill, sp. nov. 
Pileus tough, subcartilaginous, convex, deeply umbilicate, gregarious, 1-2 cm. broad; 
surface smooth, glabrous, uniformly pale-tan, margin concolorous, estriate, incurved when 
young: lamellae short-decurrent, crowded, narrow, white: spores ellipsoid, smooth, hyaline, 
6-7 X 3-44: stipe cylindric, equal, firm, smooth, glabrous, pruinose at the apex, concolorous, 
solid, 4 em. long, 2 mm. thick. 
Type collected on decayed limbs in wet woods at New Orleans, Louisiana, September 7, 1908, 
F. S. Earle 103 (herb. N. Y. Bot. Gard.). . 
DistTRIBurion: Known only from the type locality. 
5. Omphalina Dawsonii Murrill, sp. nov. 
Pileus convex, depressed at the center, rather fleshy, cespitose, 3-5 cm. broad; surface 
smooth, glabrous, isabelline to pale-fulvous, margin concolorous, estriate, undulate, incurved 
when young: context white, mildly astringent, with a slightly unpleasant odor: lamellae 
decurrent, crowded, narrow, thin, dirty-white: spores subglobose, smooth, hyaline, 4-6 u: 
stipe subfleshy, cylindric, smooth, glabrous, concolorous, hollow, 7-10 em. long, 3-5 mm. thick, 
closely united by mycelium with two or more adjacent stipes for some distance from the base. 
Type collected on a rotten log at Lima, Ohio, in 1902, C. W. Dawson 49 (herb. N. Y. Bot. Gard.). 
DISTRIBUTION: Known only from the type locality. 
