North American species of Mycena.

EUMYCENA: TYPICAE

339

Marshall, The Mushroom Book, plate opposite p. 55 (as M. galericulata).
Moffatt, Bull. Chicago Acad. Sci., 7, pl. 4 (as M. galericulata).
Murrill, Mycologia, 10, pl. 8, fig. 5 (as M. galericulata).
Ricken, Die Blitterpilze, 2, pl. 111, fig. 3 (as M. calopus).
Thomas, Field Book of Common Gilled Mushrooms, pl. 13, no. 90 (as
M. galericulata).
Pileus 1-3 (5) cm. broad, obtusely conic to campanulate, the
margin either straight or curved in against the gills, expanding to
broadly conic or broadly campanulate, sometimes nearly plane, rarely
gibbous, frequently splitting radially part way to the disc, or the disc
variously cracked, the margin usually becoming crenate, surface
moist and glabrous, hygrophanous, fuscous to dark watery gray at
first, the margin pallid or whitish, gradually changing to whitish over
all (the disc usually a bit grayish), translucent-striate, hygrophanous,
and fading to a dead whitish gray or pale cinereous; flesh thick on the
disc, thin elsewhere, grayish to whitish, fragile, odor and taste slightly
farinaceous; lamellae ascending-adnate, usually with a slight tooth
but readily seceding, close to subdistant, 26-35 reach the stipe, about
three tiers of lamellulae, broad (3-6 mm.), white or pale grayish,
sometimes evenly flushed with an incarnate tinge, edges even; stipe
5-10 cm. long, 1.5-3 (4) mm. thick, equal, fragile, tubular or hollow,
base densely strigose, lower portion at first covered with an appressed
white fibrillose coating, which breaks up into fibrillose flecks and
eventually disappears, sometimes remaining appressed and causing the
stipe to appear fibrillose-striate, apex pruinose but soon polished,
pallid above, pale to dark gray toward the base at first, yellowish to
tawny brown below in age, basal fibrils also becoming tawny.
Spores 7-9 (10) X 5-6.5 (7) Au, broadly ellipsoid, smooth, strongly
amyloid; basidia four-spored; pleurocystidia not differentiated;
cheilocystidia embedded in the gill edge and very inconspicuous,
clavate to subcapitate, 24-36 X 5-10,u, apices covered with contorted
slender or obese projections; gill trama homogeneous, pale yellowish
to sordid brown in iodine; pileus trama with a distinct pellicle, a welldifferentiated hypoderm, and a filamentous tramal body, pale yellowish to sordid brownish in iodine.
Habit, habitat, and distribution.-Densely gregarious to cespitose
on decaying hardwood logs and stumps during the spring and fall.
In eastern North America it is abundant in the area bounded by
Nova Scotia, Ontario, Manitoba, Missouri, North Carolina, and
New York. In Oregon it has been found on oak, but it appears to be
generally rare along the Pacific coast.