Part 5, 1916] AGARICACEKAEK 355 
spores oblong or narrowly ellipsoid, about 10 X 4-5 u: stipe white, slightly white-villose at 
the base, slender, equal, hollow, 16-24 mm. long, about 1 mm. thick. 
Tyre Ltocatity: North Greenbush, New York. 
Hasrrat: Among fallen leaves. 
DISTRIBUTION: Known only from the type locality. 
2. Gymnopus ludovicianus Murrill, sp. nov. 
Pileus thin, rather tough, resembling Marasmius, convex to expanded, slightly umbilicate, 
gregarious or subcespitose, 1-1.5 cm. broad; surface glabrous, strongly rugose, pallid, margin 
concolorous, slightly striate, inflexed when young: lamellae adnate with a collar, distant, in- 
serted, of moderate width, strongly interveined, white: spores globose, smooth, hyaline, 
granular, 4-6 uw: stipe cylindric, equal, firm, solid, smooth, glabrous, pallid above, reddish- 
brown at the base, 3-4 cm. long, 1-2 mm. thick. 
Type collected in humus on the ground in wet woods in City Park, New Orleans, Louisiana, 
September 3, 1908, F. S. Earle 26 (herb. N. Y. Bot. Gard.). 
DIsTRIBUTION: Known only from the type locality. 
3. Gymnopus tuberosus (Bull.) Murrill. 
Agaricus tuberosus Bull. Herb. Fr. pl. 256. 1785. 
Collybia tuberosa Quél. Champ. Jura Vosg. 60. 1872. 
Pileus thin, corivex or nearly plane, obtuse or slightly umbonate, 6-12 mm. broad; surface 
glabrous or nearly so, white: lamellae close, thin, adnate, white: spores ellipsoid, 5-6 X 3 u: 
stipe slender, clothed with a thin, pulverulent, white tomentum, often nearly naked toward the 
apex, whitish or slightly reddish-tinted, growing from a yellowish or reddish-brown sclerotioid 
tuber of variable shape, 2-4 cm. long, scarcely 1 mm. thick. 
TYPE LOCALITY: France. 
Hastrat: On old blackened fungi, decayed sticks, or damp soil rich in decayed vegetable matter. 
DIsTRIBUTION: Canada to North Carolina and west to Washington, Oregon, and California; 
also in Europe. : 
ILtusTRATIONS: Bull. Herb. Fr. pl. 256, pl. 522, f. 4; Cooke, Brit. Fungi pl. 144 (197)A. 
Exsiccatr: Erb. Critt. Ital. Ser. Il. 932; Roum. Fungi Sel. 7312; Thiim. Myc. Univ. 2103. 
4. Gymnopus albus (Peck) Murrill. 
Collybia alba Peck, Ann. Rep. N. Y. State Mus. 41:62. 1888. 
Pileus thin, convex or hemispheric, obtuse, 6-10 mm. broad; surface glabrous, white: 
lamellae broad, subdistant, ventricose, aduexed or nearly free: spores broadly ellipsoid or 
subglobose, 4-5 3-4 2: stipe glabrous, white, short, equal or slightly thickened at the apex, 
about 2.5 cm. long, 1-2 mm. thick. 
TYPE LocaLity: Gansevoort, New York. 
Hazirat: On mossy decayed wood and stumps. 
Distrisution: Northern New York. 
5. Gymnopus microsporus (Peck) Murrill. 
Collybia microspora Peck, Bull. Torrey Club 22: 486. 1895. 
Pileus thin, convex, subumbonate, 12 mm. broad; surface glabrous, white: lamellae sub- 
distant, nearly plane, white, changing to rusty-brown on drying: spores minute, broadly 
ellipsoid, 4 X 3»: stipe slender, glabrous, white, becoming brown on drying, hollow, 2.5 cm. 
long, 2 mm. thick. 
Type LOCALITY: Rooks County, Kansas. 
Hasrrat: On wet ground under bushes. 
DISTRIBUTION: Kansas. 
6. Gymnopus pallidus Murrill, sp. nov. 
Pileus convex-umbilicate, thin, gregarious, 3 cm. broad; surface dry, smooth, glabrous, 
hygrophanous, whitish, margin entire or undulate, not striate, white, inflexed when young: 
lamellae adnate, crowded, narrow, white: spores ellipsoid, smooth, hyaline, obliquely apiculate 
