North American species of Mycena.

368 NORTH AMERICAN SPECIES OF MYCENA

forms have sometimes been given names. This has not been done in
Mycena because most of them appear to represent seasonal variations.
In a previous account (Smith, 1936) the spores were described as
yellowish in iodine and hence nonamyloid. Tests on various collections since that time have demonstrated that the spores actually
are weakly amyloid, as Ktihner described them. The separation of
the gills from the stipe and their adherence to one another to form a
collar around the stipe is apparently unusual and without particular
taxonomic significance. The one species supposedly distinguished
by this character, M. collariata, is very poorly known in Europe.
In collection 9091 from Kerby, Oregon, November 26, 1937, the
spores were found to measure 8-12 X 4-5 jt, and a mixture of twoand four-spored basidia was noted on many pilei.
181. MYCENA CINERELLA var. SUBVISCIDA Kauffman and Smith
Pap. Mich. Acad. Sci., Arts, and Letters, 17: 178. 1933
Illustrations: Text fig. 45, nos. 5-6 (p. 377).
Pileus 5-10 mm. broad and high, conico-campanulate or obtuse,
broadly convex or obtusely umbonate at maturity, glabrous, striatulate, subviscid, color sordid brownish cinereous; flesh membranous,
grayish, taste slightly farinaceous, no odor; lamellae ascending,
arcuate with a decurrent tooth, close, moderately broad, becoming
ventricose, whitish then tinged ashy, edges pallid and even; stipe 3-4
cm. long, 1 mm. thick, equal, rather cartilaginous, apex pruinose, base
slightly strigose, remainder glabrous, grayish or brownish gray over
all, subviscid to the touch when wet.
Spores ellipsoid, 7-8 (8-10) X 4-5 /, amyloid, basidia two- or
four-spored, 20-22 X 7-8,t; cheilocystidia embedded or projecting
slightly, clavate to subcapitate, with or without a pedicel, 26-38 X
9-15 Au, enlarged portion smooth at first but soon becoming roughened
with rodlike projections; no pleurocystidia; pileus trama with a welldifferentiated subgelatinous pellicle, a distinct hypoderm, and the
remaining flesh of filamentous hyphae, all but the pellicle dark vinaceous brown in iodine; gill trama vinaceous brown in iodine.
Habit, habitat, and distribution.-Gregarious on sphagnum, September; Michigan. Known only from the type locality.
Observations.-The outer cortex of the stipe gelatinized slightly,
producing the viscidity noted. The gelatinization is not sufficient,
however, to justify placing the species in Glutinipes. This variety