North American species of Mycena.

EUMYCENA: DEMINUTIVAE

105

consistency, and, to a certain extent, in color as well as in their spores
and cystidia. Macroscopically the habitat readily distinguishes
them. Microscopically the gelatinous pellicle of M. juncicola distinguishes it at once.
36. MYCENA JUNCICOLA (Fr.) Gillet
Champ. Fr., 1: 282. 1878
Agaricus juncicola Fries, Syst. Myc., 1: 160. 1821.
Illustrations:
Plate 1 A; Text fig. 7, nos. 3, 6 (p. 91).
Fries, Icon. Sel. Hymen., 1, pl. 85, fig. 6.
Smith, Mycologia, 28: 412, fig. 1, no. 4; p. 416, fig. 2, no. 2.
Pileus 1-3 mm. broad, conic to convex or broadly convex with or
without a slight papilla, margin straight at first, surface uneven or
rugulose around the disc, glabrous, moist and shining, opaque, sulcatestriate to the disc when fresh, disc tinged purplish to vinaceous or
grayish vinaceous, the margin paler vinaceous to whitish; flesh membranous, fragile, odor and taste not distinctive; lamellae distant,
broadly adnate, narrow or moderately broad in large caps, pale grayish vinaceous, edges whitish to gray; stipe 3-5 (25) mm. long, filiform,
glabrous above, hyaline, grayish white or grayish vinaceous, inserted
or attached by an inconspicuous flat vinaceous or brownish plate
0.5-1 mm. broad.
Spores 9-11 X 5-6 yu, narrowly ovoid, slightly amyloid; basidia
four-spored; pleurocystidia rare, similar to the cheilocystidia; cheilocystidia numerous, 18-30 X 9-12 u, broadly clavate to subglobose,
verrucose or with a few short rodlike projections over the apex and
verrucose over the remainder, hyaline; gill trama composed of enlarged cells, homogeneous, pale vinaceous in iodine; pileus trama
with a thick gelatinous pellicle when revived in KOH (usually appearing only subgelatinous when in water mounts of fresh material),
tramal body mostly of enlarged cells but a narrow band of filamentous
tissue present next to the subhymenium, pale vinaceous in iodine
except for the pellicle.
Habit, habitat, and distribution.-Scattered or in small clusters
on sedge culms, spring and fall; Oregon and Washington.
Material studied.-Smith, 3512, 3545, 3613, 14000.
Observations.-This is a very distinctive little fungus that can
readily be recognized by its dull pale-vinaceous color, size, cheilo