North American species of Mycena.

MURRILL'S SEMITROPICAL SPECIES

467

OMPHALIA CUSPIDATELLA Murrill
Mycologia, 8: 219. 1916
Omphalina cuspidatella Murrill, North Am. Flora, 9: 349. 1916.
"Pileus convex to plane, with an abrupt small, conic, pointed
umbo, cespitose, reaching 1 cm. broad; surface white, with a faint
rosy tint, slightly silky, smooth, margin thin, entire, white: lamellae
decurrent, arcuate, distant, white with a slightly yellowish tint: stipe
slightly dilated above and tapering below, smooth, white, glabrous,
1.5 cm. long, 2 mm. thick.
"Type collected on the ground in rich moist soil under tree ferns
at Morce's Gap, Jamaica, December 29-January 2, 1908-9, W. A.
& Edna L. Murrill 727 (herb. N. Y. Bot. Gard.).
"Distribution: Known only from the type locality."
I have examined the type specimen and obtained the following
data: The spores measure 7-8 X 4.5-5 u, are broadly ellipsoid,
smooth, apparently hyaline in KOH, and yellowish in iodine. The
basidia are four-spored and no pleurocystidia or cheilocystidia are
differentiated. The tramae of the gills and pileus are each homogeneous and not otherwise distinctive. In stature the fungus resembles a robust M. ignobilis.
OMPHALIA CUTICOLOR Murrill
Mycologia, 8: 220. 1916
Omphalopsis cuticolor Murrill, North Am. Flora, 9: 317. 1916.
"Pileus convex to plane, slightly depressed at the center, solitary,
2 cm. broad; surface striate, dull-rosy-isabelline, hygrophanous at
the center: lamellae decurrent, broad, distant, interveined, whitish:
spores ovoid, much pointed at one end, smooth, hyaline, 5-7 X 3-4,u:
stipe cylindric, equal, slightly enlarged above, smooth, glabrous, concolorous, about 3 cm. long and 1 mm. thick."
Type collected on buried wood near Motzorongo, Mexico, 1,500
meters' elevation. It consists of a single carpophore of a distinctly
fleshy consistency. The spores were found to be ellipsoid and no
more pointed than usual in spores of this shape. They measure
7-8 X 4-5 JL, are hyaline in KOH, smooth, and amyloid. The
basidia are four-spored. Pleurocystidia were not differentiated but
occasional clavate-roughened cheilocystidia slightly larger than the
basidia were observed. The projections are scattered and hard to