278 NORTH AMERICAN FLORA [VOLUME 9 
very distant, rather broad, pure-white: spores 15-18 X 6-6.5 »; basidia 2- or 4-spored: stipe 
very short, terete, equal, subglabrous, pure-white, inserted by a naked base, 2 mm. long, 0.7 
mum. thick. 
Type collected upon stems of sedges in marshes near Ann Arbor, Michigan, October, 1907, 
C. H. Kauffman (herb. Kauffman). . 
DISTRIBUTION: Known only from the type locality. 
121. Marasmius opacus Berk. & Curt. Jour. Bot. & Kew Misc. 1:99. 
1849. 
Pileus submembranous, convex, often slightly depressed around a central umbo, 5-8 mm, 
broad; surface rugulose, scarcely striate, opaque, pulverulent, white: lamellae adnexed, 
distant, ventricose: spores 6-7 X 3 u: stipe insititious, elongate, pulverulent, subfurfuraceous, 
pallid, 2.5-4 cm. long, 1 mm. thick. 
TYPE Locality: South Carolina. 
Hasitat: Fallen leaves and branches. 
DIstTRIBUTION: South Carolina and Ohio. 
Exsiccati: Rav. Fungi Car. 3: 6. 
122. Marasmius ramulinus Peck, Ann. Rep. N. Y. State Mus. 51: 
286. 1898. 
Pileus very thin, submembranous, broadly convex, subumbilicate, 4-8 mm. broad; surface 
white, margin nearly even to irregularly plicate-striate: lamellae adnate, rather close, white: 
spores 7-8 X 3.5-4 uw: stipe slender, inserted, whitish, becoming tawny-red, stuffed, minutely 
downy or pruinose, 12-18 mm. long. 
TYPE Locality: Delmar, New York. 
Hapitat: Dead twigs and herbaceous stems. 
DISTRIBUTION: Known only from the type locality. 
123. Marasmius phyllophilus Peck, Bull. N. Y. State Mus. 116: 26. 
1907, 
Pileus membranous, convex or nearly plane, gregarious, 8-16 mm. broad; surface dry, 
strongly rugose-striate or rugose-sulcate, whitish with a faint pinkish tint when dry: lamellae 
adnexed, distant, narrow, rounded behind, whitish, the interspaces venose: spores 5-6 X 3—4 u: 
stipe inserted, slender, equal, tough, hollow, white, covered with whitish downy or velvety 
pubescence, 20-30 mm. long, 1 mm. thick. 
TYPE LOCALITY: Wading River, New York. 
HasirarT: On fallen leaves. 
DistRIBUTION: New York. 
124, Marasmius insititius Fries, Epicr. Myc. 386. 1838. 
Pileus membranous, convex to plane or subumbilicate, 6~12 mm. broad; surface not 
polished, pale-yellowish-brown, then whitish, margin becoming plicate-sulcate: lamellae un- 
equal, simple, broadly adnate, distant, narrow in front, pallid: spores 4 X 2.5 « (Massee): 
stipe inserted, horny, hollow, reddish-brown, floccose-furfuraceous, 2-3 em. long, 1 mm. thick. 
TYPE LOCALITY: Sweden. 
Hasrrat: Leaves and twigs. 
DisTRIBUTION: New York to North Carolina and west to Minnesota and Missouri; alsoin Europe. 
ItiustrRations: Berk. Outl. Brit. Fungol. pl. 14, f. 6. 
ExsiccaTi: Rab.-Wint. Fungi Eur. 3533. 
125. Marasmius tomentosipes Peck, Bull. Torrey Club 29: 71. 1902. 
ea caulicinalis Sw. Sv. Vet.-Akad. Nya Handl. 29: 82. 1808. Not A. caulicinalis Bull. 
Marasmius caulicinalis Fries, Epicr. Myc. 383. 1838. 
Pileus thin, convex, becoming nearly plane, generally umbilicate, gregarious or sub- 
cespitose, 1-3.5 cm. broad; surface glabrous, widely striate on the margin when moist, golden- 
yellow, brownish-yellow, or ferruginous, often becoming brown with age: lamellae adnate or 
