North American species of Mycena.

486 NORTH AMERICAN SPECIES OF MYCENA

grayish-white, margin even, entire to rimose; context very thin,
white, odorless, slightly astringent; lamellae adnate, narrow, distant,
inserted, white to discolored, entire; spores ellipsoid, smooth, hyaline,
1-guttulate, about 4.5-3 j/; stipe equal, smooth, glabrous, white above,
ferruginous below, about 6 X 0.1-0.2 cm.
"Type collected by West, Arnold and Murrill on a much-decayed
hardwood log in Kelley's Hammock, ten miles northwest of Gainesville, Fla., July 21, 1938 (F 18277). Also collected by the same persons at Grove Park, Fla., July 15, 1938 (F 18270). Very thin and
partially reviving but having the general appearance of Mycena."
I have studied a portion of the type which Dr. Murrill sent to me
for examination and have recorded the following data: The tramae
of the pileus and gills are nonamyloid. The pileus is corticated by a
layer of clavate-hyaline cells arranged into an upright hymeniform
layer. The individual cells measure 18-28 X 7-12 ju, and occasionally bear one or two very inconspicuous projections. Plellrocystidia
are not present. Cheilocystidia are abundant and more or less capitate but hyaline and smooth. They measure 9-12 J across the apex
and frequently have pedicels up to 20 y, long. The spores are nonamyloid and measure 4-5 X 3 t. In my opinion the species should
be placed in Marasmius.
Prunulus Myrciae (Pat.) Murrill, North Am. Flora, 9: 339. 1916.
Androsaceus Myrciae Patouillard, Bull. Soc. Myc. Fr., 15: 192. 1899.
"Pileus very minute, orbicular, convex-campanulate, obtuse,
cespitose, 1-2 mm. broad; surface white, changing to lemon-yellow
on drying and becoming tinged with russet on the disk, smooth or
slightly striate, pellucid, fleshy, covered with a pellicle formed of
rounded, hyaline, verrucose cells reaching 8-12, in diameter: lamellae white, few, quite thick, adnate to slightly decurrent, inserted, not
connected by veins: spores ovoid, smooth, hyaline, 5 X 3 ji: stipe
white, cylindric, delicate, almost filiform, equal or scarcely enlarged
below, 4-6 mm. long, pubescent over its entire surface with cylindric,
unicellular hairs which are scattered or in tufts...."
This is Murrill's translation of Patouillard's description. The
species was found in Guadeloupe on dying leaves of Myrcia. I have
not seen authentic specimens, and believe that, in the absence of information in addition to that given by Patouillard, the fungus should
be left in the genus in which it was originally described. The clavate