North American species of Mycena.

424 NORTH AMERICAN SPECIES OF MYCENA

217. MYCENA EPIPTERYGIOIDES Pearson
Trans. Brit. Myc. Soc., 6: 135. 1918
Mycena epipterygia var. epipterygioides Kuhner, Encyc. Myc., 10: 353. 1939.
Illustrations:
Plate 93 B; Text fig. 51, nos. 4-5 (p. 416).
Lange, Flora Agar. Dan., 2, pl. 58 C (as M. pelliculosa).
Pileus 1-2.5 cm. broad, ovoid to obtusely conic, soon broadly
conic to convex, sometimes nearly plane in age, often with a somewhat flattened disc or a low umbo, margin appressed against the stipe
when young as well as exceeding the gills and often becoming somewhat crenate, often flaring in age, surface hoary-pruinose when young,
finally naked, viscid to glutinous, pellicle completely separable, sulcate-striate at maturity, color "deep olive buff" to "citrine drab,"
fading to "dark olive buff" or "deep olive buff," never white; flesh
thin, tenacious, dark olive brownish, odor faint, reminding one of
fresh cucumbers, taste farinaceous but not strong; lamellae ascending
but bluntly adnate, sometimes toothed; subdistant to close, 18-23
reach the stipe, two tiers of lamellulae, moderately broad, sometimes
separating from the stipe but remaining attached to each other and
thus forming a collar, white or gray-tinged, edges pallid and even,
becoming reddish-spotted in age; stipe 4-6 (7) cm. long, 1.5-2.5 mm.
thick, equal, straight or flexuous, glabrous, glutinous, base with
scattered fibrils, color pale greenish yellow, whitish or grayish above
in age and base frequently reddish brown.
Spores ellipsoid, 8-10 (12) X 5-6 y, amyloid; basidia four-spored,
32-36 X 6-7 i, sterigmata stout; cheilocystidia embedded in a gelatinous matrix, narrowly clavate, the upper portion with obtuse contorted projections which may or may not be branched, the head 5-8,u
thick, branches 2-4. thick, pedicels indistinct; no pleurocystidia;
gill trama floccose, subhymenium not gelatinous, gill edge gelatinizing,
floccose tissue vinaceous brown in iodine; pileus trama with a thick
gelatinous pellicle, floccose below the pellicle but the hyphae moderately broad, all but the pellicle vinaceous brown in iodine; stipe with
a thick outer gelatinous layer, the inner portion vinaceous red in
iodine.
Habit, habitat, and distribution.-Gregarious under conifers or
also under oak, usually appearing late in the fall after the first heavy
frosts. I have collected it in Michigan, Washington, and Oregon.
Hesler has found it in Tennessee and Burke in Alabama. In the