North American species of Mycena.

MURRILL'S SEMITROPICAL SPECIES

459

A hypoderm is apparently present (the trama did not revive well).
The consistency of the remoistened fruiting body was very soft and
fragile like that of specimens of M. capillaripes. In fact, the two
are very likely closely related. To judge from the type, M. gracilipes
has the same stature as a small specimen of M. filopes.
MYCENA LATERICIA Murrill
Mycologia, 8: 220. 1916 (not M. latericia Velenovsky, Ceske Houby,
p. 303. 1920-22)
Prunulus latericius Murrill, North Am. Flora, 9: 342. 1916.
"Pileus campanulate, solitary, 1 cm. broad, 8 mm. high; surface
glabrous, latericeous, margin concolorous, not striate: lamellae
broad, subdistant, slightly sinuate, testaceous: spores ovoid, smooth,
hyaline, 6 X 3.5 tu: stipe tapering downward, smooth, glabrous,
latericeous, 2 cm. long, 2.5 mm. thick.
"Type collected in moss on the ground under tree ferns at Morce's
Gap, Jamaica, 1500 m. elevation, December 29, 30, January 2, 1908-9,
W. A. & Edna L. Murrill 725 (herb. N. Y. Bot. Gard.).
"Distribution: Known only from the type locality."
The type specimens appear to be fairly well preserved but revive
poorly. The spores measure 3-4,' and are globose, or broadly ellipsoid and 4-5 X 3.5,. They are nonamyloid and at least some collapse very readily. Some are apparently smooth under oil immersion,
but others seem to have 2-3 very short aculeae scattered over their
surfaces, and some appear to be subangular. These characters were
studied carefully and apparently are not reliable. I suspect that the
obscure scattered aculeae and subangular appearance were caused by
failure of the spores to revive completely. The only basidia seen
with sterigmata were two-spored. No pleurocystidia were observed,
and occasional cheilocystidia were found which were shaped like the
basidia but had their apices covered with short rodlike projections.
The tramae of the pileus and gills turned yellowish in iodine, but no
other details could be accurately ascertained.
MYCENA MARGARITA Murrill
Mycologia, 8: 220. 1916
Prunulus margarita Murrill, North Am. Flora, 9: 340. 1916.
"Pileus broadly convex with a small umbo, solitary, 1 cm. broad;
surface glabrous, distantly and regularly striate, ashy-white, almost