North American species of Mycena.

EUMYCENA: TYPICAE

343

Observations.-The color of the pileus is variable much as in
M. megaspora. Hesler (11537) has found a very pale to whitish form
at Newfound Gap in the Great Smoky Mountains National Park.
The striae of the pale forms are very conspicuous, whereas those of
the darkly colored pilei are not. Certain of these color forms may be
distinct genetically and fairly constant, but the differences among
them are not sufficient to justify taxonomic recognition. The pseudorhiza in this species, as in others, varies according to the substratum. On a hard surface it may be lacking, but on a soft one, such
as a very rotten log, it is usually quite long.
The spores are slightly smaller than those of M. galericulata,
and the reddish stains are usually much more pronounced, but otherwise the two species are almost indistinguishable. M. maculata as I
have found it is generally more inclined to a cespitose habit. The
short-stiped specimens Kauffman placed in M. tinctura apparently
belong here, as does the variety he described in the Agaricaceae of
Michigan under "M. haematopoda." Although a watery juice is
present in the stipe of this species, the fungus does not belong in the
section Hydropus. Such a watery juice is present in varying amounts
in all the larger Mycenae I have tested. The relationships of M.
maculata are obviously with the other small-spored species that resemble M. galericulata in color and consistency.
168. MYCENA OCCIDENTALIS Murrill
Mycologia, 8: 221. 1916
Prunulus occidentalis Murrill, North Am. Flora, 9: 337. 1916.
Illustrations: Plates 53 D, 81; Text fig. 41, nos. 7-8 (p. 328).
Pileus 1-2 cm. broad, broadly conic to convex, often with a flattened disc, becoming broadly campanulate to broadly convex, in age
sometimes nearly plane, margin appressed against the stipe at first,
surface hoary but soon polished and naked, when wet lubricous to
subviscid, conspicuously translucent-striate to disc at maturity when
moist, at times slightly rugulose around the center, color occasionally
"fuscous" when young but more often dark watery gray, becoming
somewhat drab gray on the disc and pale watery gray along the margin, fading (often on the disc first) to ashy brown or brownish gray;
flesh thin except under the disc, brittle or moderately pliant, dark
gray, becoming pallid, no odor, taste mild; lamellae adnate at first,
developing a slight tooth or becoming adnexed, subdistant to distant,