North American species of Mycena.

408 NORTH AMERICAN SPECIES OF MYCENA

"White, rather tenacious; pileus convex or hemispherical, glabrous,
striate, deeply umbilicate, sometimes perforate, viscid when moist;
lamellae subdistant, decurrent; stem slender, equal, hollow, smooth,
villose at the base; spores elliptical,.00025' long.
"Plant gregarious, about 1' high, pileus 3"-6" broad.
"Prostrate dead trunk of a small spruce tree. Providence, Saratoga county. August.
"Dedicated to Mr. C. F. Austin."
Material studied.-The type and Kauffman, September 8, 1914,
North Elba, New York.
Observations.-The type specimens closely resemble those of
M. glutinosa in their macroscopic characters. The spores of Peck's
type were found to measure 7-8 X 3.5-4 A and to be hyaline,
smooth, ellipsoid, and strongly amyloid. The basidia were fourspored. Pleurocystidia were scattered, measured 26-28 X 5-7 g,
were subfusiform, and had acute apices that sometimes forked. For
some reason or other no good sections of the gill edges were obtained.
However, they were apparently gelatinous, and the cheilocystidia
were similar to the pleurocystidia or more branched. The subhymenium was gelatinous, and thick gelatinous layers were found over both
the pileus and the stipe, thus indicating that both were slimy when
fresh. The tramae of the gills and pileus turned slightly yellowish
brown in iodine. Lactiferous hyphae were not observed.
There is some question in my mind whether M. glutinosa is distinct from M. Austini, but I have never seen either one when fresh.
The difference in substratum and distribution, the apparent lack of
metallic hyphae in the flesh of M. Austini, and its slightly different
reaction in iodine lead me to keep the two separate-at least until
future studies clarify the situation.
207. MYCENA HONDURENSIS A. H. Smith
Contrib. Univ. Mich. Herb., 1: 22. 1939
Illustrations:
Text fig. 50, nos. 6-7 (p. 411).
Smith, Contrib. Univ. Mich. Herb., 1, pl. 1, figs. 1-2.
Pileus 1-2 cm. broad, convex to nearly plane in age, the disc
broadly depressed, margin connivent with the stipe or slightly incurved at first, surface glabrous, viscid, striate on the margin or