North American species of Mycena.

466 NORTH AMERICAN SPECIES OF MYCENA

tioning whether or not the small spores belong to the species; they
were seen attached to sterigmata and were present in great numbers.
The type specimen establishes the species. Hence the discrepancies
in Murrill's description should be regarded as errors of observation.
This species is obviously very closely related to M. hondurensis
and M. euspeirea. From the former it differs markedly in color (being
whitish as Murrill described it) and in having decurrent gills. Specimens of both species have been compared and in the dried condition
are easily distinguished at sight. It is more difficult to distinguish
M. trojana from M. euspeirea. In fact, the two impress me as being
identical. Before reducing any species in this group to synonymy,
however, one should study the type of M. euspeirea to determine
whether it actually does belong in Glutinipes.
MYCENA VIRIDIGRISEA Murrill
Mycologia, 8: 221. 1916
Prunulus viridigriseus Murrill, North Am. Flora, 9: 340. 1916.
"Pileus broadly convex, minutely papillate, often becoming
slightly umbilicate, at least on drying, gregarious, 1.5-2 cm. broad;
surface dry, innately pubescent-fibrillose, greenish-gray, almost glaucous, margin fimbriate, concolorous, slightly striate: lamellae adnexed, very broad, subcrowded, greenish-gray: spores globose,
smooth, hyaline, 5-6 u: stipe cylindric, equal, short, smooth, glabrous,
stramineous, attached by a broad circular mat of mycelium, 2 cm.
long, 1-2 mm. thick.
"Type collected on a dead log at Troy and Tyre, Cockpit Country,
Jamaica, January 12-14, 1909, W. A. Murrill & W. Harris 948 (herb.
N. Y. Bot. Gard.).
"Distribution: Known only from the type locality."
The type consists of a good collection of well-preserved carpophores. The spores are globose, smooth, hyaline, and amyloid, and
measure 5-6,t. The basidia are four-spored. Pleurocystidia were
not seen, and the cheilocystidia were rare. They measure 20-38 X
10-20,u, are saccate, hyaline, and smooth. It was necessary to make
several mounts before they were clearly demonstrated. The gill
trama and pileus trama are each homogeneous. The fruiting bodies
revive well, so well, in fact, that one cannot help but wonder if the
species should not be placed in Marasmius in spite of its amyloid.
spores.