North American species of Mycena.

288 NORTH AMERICAN SPECIES OF MYCENA

The pellicle of M. peltata is not the typically gelatinous type, and
as a result the pileus is not truly viscid when fresh. In late fall, the
time this species fruits, cold nights are rather frequent and more than
likely many of the fruiting bodies are frosted. The pellicle of the
frosted carpophores may possibly show more of a tendency to gelatinize when mounted in KOH than that of normal material.
STIPE LONG; CYSTIDIA TYPICALLY SMOOTH
139. MYCENA VITILIS (Fr.) Quelet
Champ. Jura et Vosges, p. 106. 1872
Agaricus vitilis Fries, Epicr. Syst. Myc., p. 113. 1838.
Illustrations:
Plate 56; Text fig. 34, nos. 1-2.
Konrad et Maublanc, Icon. Sel. Fung., 3, pl. 233, I.
Lange, Flora Agar. Dan., 2, pl. 52, fig. D (very good).
Pileus 5-15 (20) mm. broad, obtusely conic with an appressed
margin when young, becoming campanulate or somewhat umbonate,
the margin plane or becoming recurved, surface hoary at first but
soon polished and lubricous, sometimes subviscid but the pellicle
adnate or separable only in shreds, glistening when dry, margin even,
slightly striate, color "drab" when fresh, fading to pale gray or nearly
white in age, sometimes with a strong brownish tint when fresh and
fading to "clay color," at least around the disc; flesh thin but pliant,
grayish or pallid, cartilaginous, odor and taste not distinctive; lamellae
attached by a tooth or narrowly adnate, close to subdistant, narrow,
equal, white or grayish, edges concolorous and often slightly eroded;
stipe 6-12 cm. long, (1) 1.5-2 mm. thick, equal, cartilaginous and
tough, flexuous or straight but usually curved toward the base at
least, tubular, rooting in the debris or attached to sticks, buried portion white-strigose, surrounded with a thin subgelatinous layer, which
causes it to be lubricous to the touch, bluish black at first, soon gray,
nearly concolorous with the pileus, apex somewhat fibrous-striate.
Spores 9-11 X 5-6 u, ellipsoid, amyloid; basidia four-spored;
pleurocystidia not differentiated or occasionally present near the edge
and similar to cheilocystidia; cheilocystidia 32-46 X 8-14,, fusoidventricose or with two to several obtuse fingerlike projections arising
from the apex; gill trama vinaceous brown in iodine, the subhymenium