North American species of Mycena.

GLUTINIPES: FULIGINELLAE

435

possesses a thick gelatinous pellicle, the gill edges are very gelatinous,
the cheilocystidia are indistinct, as in M. vulgaris, and the spores
measure 7-8.5 X 4,. In view of this information M. melleidisca is
reduced to synonymy with M. vulgaris.
223. MYCENA PELLICULOSA (Fr.) Quelet
Champ. Jura et Vosges, p. 343. 1873
Agaricus pelliculosus Fries, Epicr. Syst. Myc., p. 116. 1838.
Illustrations: Text fig. 53, nos. 2-3, 5 (p. 438).
Pileus 5-10 mm. broad (probably larger when growing luxuriantly), convex with an abrupt and rather broad depression on the
disc, glabrous, viscid, fuliginous, fading to pale gray and at times
assuming brownish tints, striate, striae dark and conspicuous; flesh
thin, pliant and cartilaginous, grayish, odor and taste not distinctive;
lamellae arcuate-decurrent, narrow to only moderately broad, distant,
white, edges even and concolorous with the faces; stipe 1-2 cm. long,
1 mm. thick, equal, tubular, very cartilaginous-pruinose over all but
soon naked and viscid, concolorous with the pileus or paler, base
slightly strigose.
Spores ellipsoid to ovoid, (7) 8-10 X 4-5 At, amyloid; basidia fourspored, 22-26 X 7-8 Au; cheilocystidia 20-40 X 4-10 M, numerous,
not gelatinizing completely (although the gill edge itself becomes distinctly gelatinized), clavate to nearly cylindric and often contorted,
the apices with few to many short rodlike projections, sometimes the
head or enlarged portion is branched and the branches bear rodlike
processes; pleurocystidia numerous and of two types that intergrade
with each other, the first type similar to the cheilocystidia in shape,
size, and markings, the second composed of subfusoid individuals
with smooth or undulating walls or even with obtuse humplike projections over the apex in some, 28-34 X 8-10 y, hyaline, hardly
projecting above the basidia; gill trama with a floccose central strand
flanked by the broad gelatinous subhymenium on either side, floccose
strand pale vinaceous brown in iodine; pileus trama divided into three
zones, surface zone a gelatinous pellicle one half to two thirds the
thickness of the entire trama, below this a narrow central layer of
floccose tissue, the third zone formed by the gelatinous subhymenium,
the floccose zone faintly brownish in iodine; stipe tissue with a thick
gelatinous outer layer, the inner tissue dark vinaceous brown in
iodine.