Part 5, 1916] AGARICACEAE 347 
10. Omphalina rustica (Fries) Quél. Ench. Fung. 43. 1886. 
Agaricus rusticus Fries, Epicr. Myc. 124. 1838. 
Omphalia rustica Quél. Champ. Jura Vosg. 65. 1872. 
Pileus membranous, convex, umbilicate, 6-11 mm. broad; surface glabrous, hygrophanous, 
silky when dry, gray to whitish or brownish, margin striate when moist: lamellae decurrent, 
subdistant, thick, with the ends equally attenuate, gray: spores ellipsoid, 7.5-10 X 4-6 p: 
stipe glabrous, grayish-brown, slender, equal or enlarged above, stuffed, 2.5 em. long, 1 mm. 
thick. 
Tyre Locality: Europe. 
Hasitat: On the ground in woods or thickets. 
DISTRIBUTION: New York, Illinois, and Ohio; also in Europe. 
11. Omphalina Volkertii Murrill. 
Omphalia Volkertit Murrill, Mycologia 3:98. 1911. 
Pileus infundibuliform to umbilicate, tough, flexible, solitary or gregarious, 1-2 cm. 
broad, about 7 mm. high; surface glabrous, hygrophanous, fuliginous, becoming avellaneous 
soon after picking: lamellae decurrent, distant, tough, discolored-avellaneous: spores stub- 
globose, smooth, hyaline, 4 u: stipe crooked, tapering toward the base, concolorous, glabrous, 
hollow, 1.5-2 cm. long, 1-2 mm. thick. 
‘Type LOCALITY: Near the New York Botanical Garden, New York City. 
Haxzrrat: Mossy fields, rarely on bare ground. 
DisTRIBuTIoON: New York and Massachusetts. 
ILLUSTRATION: Mycologia 3: pl. 40, f. 3. 
12. Omphalina subclavata (Peck) Murrill. 
Omphalia subclavata Peck, Bull. Torrey Club 27: 612. 1900. 
Pileus thin, submembranous, subclavate or tubaeform, deeply umbilicate, 6-12 mm. 
broad; surface glabrous, grayish-brown: lamellae very decurrent, subdistant, yellow: spores 
ellipsoid, 6-7.5 4-5 yu: stipe slender, whitish, hollow, subpruinose, tomentose at the base, 
2.5 cm. long, 1 mm. thick. 
Tyre Locatity: Missouri. 
Hasrrat: On dead wood. : : 
DISTRIBUTION: Pennsylvania, Tennessee, and Missouri. 
13. Omphalina Epichysium (Pers.) Quél. Ench. Fung. 43. 1886. 
Agaricus Epichysium Pers. Disp. Fung. 25. 1797. 
Omphalia Epichysium Quél. Champ. Jura Vosg. 65. 1872. : 
Agaricus (Clitocybe) Gerardianus Peck, Bull. Buffalo Soc. Nat. Sci. 1:46. 1873. 
Agaricus (Omphalia) montanus Peck, Ann. Rep. N. Y. State Mus. 27:94. 1875. Not A. montanus 
Pers. 6. 
Clitocybe Gerardianus Sacc. Syll. Fung. 5: 181. 1887. 
Mycene montana Sacc. Syll. Fung. 5: 255. 1887. 
Piles membranous, fragile, nearly plane, convex, umbilicate to infundibuliform, 12-24 
mm. broad; surface hygrophanous, sooty-gray and striate when moist, paler when dry and 
silky or flocculose: lamellae narrow, subdistant, slightly decurrent, whitish or cinereous: 
spores ellipsoid, 7.5-10 X 4-6 y: stipe glabrous, cinereous, equal, somewhat hollow, 2-6 cm. 
long, 1-2 mm. thick. 
‘TYPE LOCALITY: Europe. 
Hasirat: On decaying trunks or among sphagnum. ; . ; 
DISTRIBUTION: Maine to Alabama and west to Wisconsin and Seattle, Washington; also in 
Europe. : 
ILLustRatIon: Atk. Stud. Am. Fungi f. 101. 
14. Omphalina Sequoiarum Murrill, sp. nov. 
Pileus infundibuliform, gregarious, 4.5-5 cm. broad; surface smooth, moist, glabrous, 
buff-colored, margin finely crenate, often splitting: context grayish-white, unchanging, without 
characteristic taste or odor; lamellae decurrent, inserted, crowded, rather narrow, white, 
