North American species of Mycena.

340 NORTH AMERICAN SPECIES OF MYCENA

Material studied.-Smith, 32-34, 32-538, 32-541, 32-607, 32-609,
32-628, 33-1084, 1361, 4962, 5030, 6220, 6279, 6367, 7699, 9528,
15064, 15101, 15127, 15567, October 8, 10, 1931, June 19, Michigan,
1935. Atkinson, collections of M. galericulata, abundant material
from Ithaca and vicinity. Hesler, 3643, 14088. Kauffman, Ithaca,
New York. Routien, 960.
Observations.-This species can best be recognized by its crenate
pileus and the fibrillose flecks usually adhering to the lower portion
of the stipe. The tendency of the base to become tawny in age is an
additional fairly reliable character, as is also the habitat on hardwood.
M. intertexta, a closely related species found on conifer wood, also
becomes tawny over the basal portion of the stipe. The cheilocystidia of M. inclinata, which are very small and difficult to demonstrate, are very irregular in shape. As a rule, they are some variation
of the clavate-roughened type, but one can frequently find individuals
which are not much more than. a contorted filament and no longer
than a basidium. The apices of the broader individuals are usually
furnished with a variable number of contorted fingerlike processes or
irregular humps. The spores are intermediate in size between those
of M. galericulata and M. hemisphaerica. These two species can nearly
always be distinguished by their glabrous polished stems.
During cold wet weather in late fall a form, very abundant locally,
occurs in which the cap, gills, and stipe become stained sordid reddish
to purplish brown. Sometimes the entire fruiting body is dark
purplish brown. The habit, habitat, spores, cheilocystidia, fibrillose
flecks on the stipe, and colors of the young fruiting bodies all indicate
identity with M. inclinata.
166. MYCENA SUBINCLINATA Murrill
Mycologia, 30: 371. 1938
Prunulus subinclinatus Murrill, ibid., p. 367.
"Pileus convex to expanded, scattered or gregarious, not densely
cespitose, about 3-5 cm. broad; surface glabrous, radiate-sulcate
and rugose, fawn-colored to dull watery-brown, darker on the umbo;
context white, taste farinaceous, lamellae almost free, white, broad,
entire; spores not examined; stipe slender, equal, hollow, smooth,
glabrous, white, whitish-mycelioid below, 6-10 cm. long.
"Type collected by Erdman West and W. A. Murrill on a dead
oak log in woods at Gainesville, Fla., November 9, 1932 (No. F 15708).