286 NORTH AMERICAN FLORA [VoLUME 9 
Marasmius (Mycena) rigidus Mont. Syll. Crypt. 143. 1856. Described from material 
sent from Ohio by Sullivant. Specimens are not available for examination. 
Marasmius saccharinus (Batsch) Fries, Epicr. Myc. 386. 1838. Reported from Ohio 
by Hard. All specimens examined have been referred to M. squamula. 
Marasmius Suilivantii Mont. Syll. Crypt. 143. 1856. Described from material sent from 
Ohio by Sullivant. Specimens are not available for examination. 
Marasmius sulphureus Johnson, Bull. Minn. Acad. Sci. 1: 337. 1878. Specimens are 
not available for examination. 
Marasmius tener Berk. & Curt. Proc. Am. Acad. 4: 121. 1858. This minute species, 
described from Wright’s collections in the Bonin Islands, was reported from South Carolina 
and Cuba. ‘The original description is very brief. 
Marasmius Vaillantii Fries, Epicr. Myc. 380. 1838. Reported from North Carolina by 
Curtis. Specimens are not available for examination. 
Marasmius viticola Berk. & Curt. Ann. Mag. Nat. Hist. II]. 4: 295. 1859. Described 
from material sent from Alabama. Reported also from Maine, New York, Ohio, and Michigan. 
Specimens examined should’ be referred to M. dichrous Berk. & Curt. or to M. foetidus Fries, 
21. POLYMARASMIUS Murrill, gen. nov. 
Pileus small, thin, membranous, reviving, glabrous or nearly so: lamellae adnate to a 
collar: spores hyaline: stipe compound, rhizomorphic, the fertile branches central and capillary: 
veil none. 
Type species, Marasmius multiceps Berk. & Curt. 
Pileus 6 mm. broad. 1. P. mulliceps. 
Pileus 2 mm. broad. 
Surface white, bay on the umbo. °2. P. submulticeps. 
Surface bay throughout. 3. P. sarmentosus. 
1. Polymarasmius multiceps (Berk. & Curt.) Murrill. 
Marasmius multiceps Berk. & Curt. Jour. Linn. Soc. 10: 298. 1868. 
Pileus hemispheric, umbilicate, blackish-papillate, cespitose, 6 mm. broad; surface white, 
glabrous, transversely rugose, margin sulcate: lamellae white, ventricose, few, adnate to a 
collar: common rhizomorphic stipe long, creeping, proliferous, black, glabrous; fertile stipe 
vertical, black, glabrous, 1.2—2.5 cm. long. 
TYPE LocaLity: Cuba. 
Hapitat: On dead logs in woods. 
DisTRIBUTION: Known only from the type locality. 
2. Polymarasmius submulticeps Murrill, sp. nov. 
Pileus hemispheric, distinctly umbonate, 2 mm. broad; surface white, deeply sulcate, 
glabrous, the umbo hemispheric and dull-bay or chestnut, margin entire, concolorous: lamellae 
broad, distant, adnate to a collar, white: fertile stipe short, smooth, glabrous, black, highly 
polished, rigid, cylindric, usually 5 mm. long and 0.5 mm. thick; common rhizomorphic stipe 
similar in appearance, but long and creeping, with many branches which bear the small 
hymenophores. 
Type collected on dead wood and humus in British Honduras, 1906, Morton E. Peck (herb. N.Y. 
Bot. Gard.). 
DISTRIBUTION: Known only from the type locality. 
3. Polymarasmius sarmentosus (Berk.) Murrill. 
Marasmius sarmentosus Berk. Lond. Jour. Bot. 5:2. 1846. 
Marasmius tomentellus Berk. & Curt. Jour. Linn. Soc. 10: 298. 1868. 
Pileus hemispheric to convex, at first umbonate, 1-2.5 mm. broad; surface fulvous to sub- 
spadiceous, margin involute to expanded, entire, densely silky, sulcate: lamellae few, concolor- 
