262 NORTH AMERICAN FLORA [VoLuUME 9 
margin subentire, concolorous, often splitting with age: lamellae adnexed, broad, pallid, distant, 
about 16 in number: stipe very long, equal, smooth, glabrous, pallid to very slightly brownish, 
yellowish-mycelioid at the base, 5-8 em. long, 0.5-1 mm. thick. 
Type collected on fallen dead leaves in the Luquitlo Mountains, Porto Rico, July, 1902, Percy 
Wilson 297 (herb. N. ¥. Bot. Gard.). : 
DrsTRIBsutTION: Known only from the type locality. 
43. Marasmius paucifolius Murrill, sp. nov. 
Pileus sruall, very thin, convex to subexpanded, slightly gibbous on the disk, gregarious, 
5-10 mm. broad; surface smooth, glabrous, rugose on the disk, bay, striate over the lamellae, 
margin broadly sinuate, entire, concolorous, incurved on drying: lamellae very few and distant, 
8-12 in number, attenuate at both ends, ventricose, narrow, adnate to a slight collar, pallid 
to slightly yellowish, interspaces entirely smooth: stipe capillary, smooth, glabrous, shining, 
avellaneous to subfuscous, 4-6 cm. long, 0.5 mm. thick. 
Type collected on dead leaves at Rio Piedras, Porto Rico, September 6, 1912, John R. Johnston 
580 (herb. N. Y. Bot. Gard.). 
DistrR1suTION: Known only from the type locality. 
44, Marasmius portoricensis Murrill, sp. nov. 
Pileus rather firm and opaque, not umbonate, cespitose, 7-10 mm. broad; surface bay, 
glabrous, rugose-striate, margin concolorous, somewhat dentate, quite irregular on drying: 
lamellae rather broad, ventricose, 2, or 3 times inserted, adnexed, fulvous, at least when dry: 
stipe very long, capillary, isabelline, finely and densely pubescent to subglabrous and somewhat 
shining, 6-8 cm. long, 0.5 mm. thick. 
Type collected on leaf-mold at Rio Piedras, Porto Rico, September 6, 1912, John R. Johnston 570 
(herb. N. Y. Bot. Gard.). 
DrsTRiBUTION: Known only from the type locality. 
45. Marasmius atropurpureus Murrill, sp. nov. 
Pileus conic to bell-shaped or hemispheric, not expanding, slightly umbonate, very thin 
and membranous but entirely opaque, gregarious, about 5 mm. broad, rarely larger; surface 
beautifully colored, atropurpureous or subvinosous with a darker-purple center, smooth, gla- 
brous, not striate, at least not until dry, minutely rugose under a lens, margin entire or slightly 
undulate, concolorous: lamellae narrow to medium, distant, about 12 in number, white, not 
interveined, adnate, attached to a collar, the edge of which, as well as the edges of the young 
lamellae, is dark-purple like the pileus: stipe long, slender, filiform, smooth, glabrous, pol- 
ished, avellaneous, at times with a slight brownish tint, slightly whitish-mycelioid at the base, 
about 4-5 em. long and 0.5 mm. thick. 
Type collected on fallen dead leaves and sticks at Lake Cunningham, New Providence, Bahama 
Islands, September 8, 1904, Elizabeth G. Britton 612 (herb. N. Y. Bot. Gard.). 
DISTRIBUTION: Known only from the type locality. 
46. Marasmius stenophyllus Mont. Ann. Sci. Nat. IV.1:116. 1854. 
?Marasmius hyperellus Fries, Nova Acta Soc. Sci. Upsal. III. 1:30. 1851. 
Marasmius semiustus Berk. & Curt. Jour. Linn. Soc. 10: 295. 1868. 
Marasmius tenerrimus Berk. & Curt. Jour. Linn. Soc. 10: 296. 1868. 
Pileus thin, soft, fleshy, but tough and persistent, convex to irregularly expanded, umbili- 
cate, becoming eccentric with age, gregarious to cespitose, 1-4 cm. broad ; surface minutely 
fibrillose to glabrous, radiate-rugose, hygrophanous, pale-yellowish-white to pale-reddish-tan, 
margin concolorous, incurved when young: lamellae adnate with a slight collar, rarely short- 
decurrent, rather distant, broad, inserted, the long ones ventricose, white, interveined, often 
forking: spores ellipsoid, smooth, hyaline, about 7-9 5-6 y: stipe tough, cylindric, tapering 
upward, usually curved, glabrous, white at the apex, pale-reddish below, whitish-mycelioid 
at the base, solid or spongy, at first central, often strongly eccentric with age, 1-4 cm. long, 
1-2 mm. thick. 
TYPE LOCALITY: French Guiana. 
Hasttrat: On banana trash and decayed stalks and logs. 
DISTRIBUTION: Jamaica, Trinidad, British Honduras, Cuba, and Grenada; also in Guiana. 
