North American species of Mycena.

482 NORTH AMERICAN SPECIES OF MYCENA

tion of the type and the application of the iodine test to the spores
showed that the reactions were negative. The spores, gill trama,
and pileus tissue are all nonamyloid. The pileus trama is perfectly
homogeneous, with scarcely any pellicle at all. No differentiated
sterile organs were found in the hymenium or on the edges of the gills
at either time. The spores measure 5-5.5 X 4-5, and are smooth and
hyaline.
More than likely the fungus can be identified with a previously
described species of Collybia. There is no assurance that Grant's
collection did not consist of a mixture of several species. Whatever
he distributed under this name should not be considered authentic.
An examination of many of his agaric collections made it evident that
he had no concept of species as far as agarics were concerned. Laccaria
laccata, for instance, turns up in his exsiccatae under more than a
half-dozen different genera.
Mycena inconspicua Krieger, Mycologia, 19: 311. 1927.
"Mycena inconspicua n. sp.; in the nomenclature of the North
American Flora, Prunulus inconspicuus (pl. 36, fig. 1).
"Pileus up to 7 mm. broad when fully expanded, broadly campanulate, with a rounded disk, brownish-ochraceous, becoming paler
with age toward the margin (there almost white); latter straight from
the first, striate, the striations conspicuous and reaching almost to the
disk; flesh so thin as to appear membranous. Gills subdistant, unequal, white, broad for their size, rounded and ascending toward the
stem where they are adnexed; edges entire, concolorous. Stem delicate, about 1.5 to 1.7 cm. long, 1.5 to 2 mm. thick, usually curved,
equal or slightly thicker below, white but not shining, finely pubescent
under a hand-lens, cartilaginous, tubular. Spores smooth, elliptical,
one end somewhat truncate, uniguttulate, slightly pinkish within,
7.7 X 4.8,.
"Baltimore, Md., July 20, 1919. Grew caespitosely on naked soil
at a street corner. No. 375.
"Near M. minutissima Murrill and M. paupercula Berk., but
neither."
The type has been badly damaged by insects, and few reliable
microscopic data could be obtained. The only spores seen which
were of the size given by Krieger were slightly angular, a fact which
leads me to believe the species is a true Rhodophyllus.