North American species of Mycena.

450 NORTH AMERICAN SPECIES OF MYCENA

Material studied.-Smith, 379, 771, 911, 963, 1104, 1106, 1133,
1164, 2489, 3214, 3334, 3544, 3791, 4045, August 30, 1934, New York;
October 10, 1934, Michigan. Bailey, 141. Isle Royale National
Park.
Observations.-The shape of the pileus varies considerably but is
generally Mycena-like. The gray stipe, pileus, and gills and the
flexuous stipe all remind one of M. cinerella, which is, of course, readily separated by its smooth unornamented spores. It seems more
logical to place this species in Mycena than in any other Friesian
genus. If one wishes to give it generic rank, Fayodia, in which
Kiihner originally placed it, should be used, but that genus should
then be limited to species with the falsely echinulate type of spore.
232. Mycena cineraria, sp. nov.
Illustration: Text fig. 55, nos. 1, 4.
Pileus 1-2.5 cm. latus, convexus demum late convexus, glaber,
valde striatus, subfuscus, hygrophanus, demum cinereus; lamellae
subdistantes, latae, late adnatae vel decurrentes, pallidae; stipes 3-4
cm. longus, 1-1.5 mm. crassus, aequalis, glaber, pallidus; sporae
6-7 X 4-4.5,, pseudo-echinulatae; cystidia 44-66 X 9-12 g, subcylindrica. Specimen typicum in Herb. Univ. Mich. conservatum.
Legit A. H. Smith, n. 17099, prope Mt. Angeles, Olympic Mts.,
Wash., Sept. 21, 1941.
Pileus 1-2.5 cm. broad, convex with a straight or slightly bent-in
margin, becoming broadly convex to plane or very slightly depressed
over the disc, surface moist and glabrous, conspicuously striate to the
disc before fading, "Saccardo's umber" or darker and more grayish
brown when moist, hygrophanous, becoming opaque and more or less
cinereous when faded; flesh watery-fragile, concolorous with cap, no
odor, taste not recorded; lamellae close to subdistant, broad, 16-20
reach the stipe, one or two tiers of lamellulae, broadly and bluntly
adnate but soon short-decurrent, "tilleul buff" (pallid), edges even
but faintly fimbriate under a lens; stipe 3-4 cm. long, 1-1.5 mm. thick,
tubular, strict, whitish to pallid, polished, the base with a thin covering of white mycelium.
Spores 6-7 X 4-4.5,, broadly ellipsoid, nonamyloid, smooth but
appearing minutely echinulate under an oil-immersion lens because
of fine pores in the spore wall; basidia four-spored; pleurocystidia
and cheilocystidia scattered to fairly abundant; obtuse, subcylindric,