North American species of Mycena.

458 NORTH AMERICAN SPECIES OF MYCENA

which were stained in phloxine-KOH mounts. Immature spores
take this stain very poorly. Because of the gelatinous layer over the
exterior of the stipe and cap and the gelatinizing gill edges, this species
must be referred to the Glutinipes. The original description, however, does not offer any clue to its being placed there. The species
appears to be very close to M. vulgaris and M. militaris, but its
southern range and its habitat on wood are not typical for either.
MYCENA GRACILIPES Murrill
Mycologia, 8: 220. 1916
Prunulus gracilipes Murrill, North Am. Flora, 9: 340. 1916.
Illustrations: Text fig. 55, nos. 8-9 (p. 451).
"Pileus hemispheric, rather thin, gregarious, 8 mm. broad, 5 mm.
high: surface glabrous, striate, fulvous when wet, nearly avellaneous
when dry, margin entire, concolorous: lamellae adnate with a slight
decurrent tooth, very distant, narrow, white: spores ellipsoid, smooth,
hyaline, 7-8 X 3-4,: stipe very long and slender, cylindric, equal,
smooth, glabrous, latericeous, becoming paler on drying, more or less
mycelioid at the base, 5-7 cm. long, 0.5 mm. thick.
"Type collected on a dead log at Cinchona, Jamaica, about 1500
m. elevation, December 25-January 8, 1908-9. W. A. & Edna L.
Murrill 606 (herb. N. Y. Bot. Gard.).
"Habitat: on dead logs and in leaf-mold.
"Distribution: Vicinity of Cinchona, Jamaica."
The spores of the type are rather variable in size. From a single
carpophore the range was found to be 8-11 (13) X (5) 6-7 (8),.
They are smooth, ellipsoid to subovoid, hyaline, and amyloid. Although only four-spored basidia were seen, it is likely that some are
two-spored. Large spores adhering in groups of two were noted.
Pleurocystidia were rare to absent; when present they were similar
to the cheilocystidia. The cheilocystidia were abundant, measure
26-38 X 8-14,t, and are either ventricose with an elongated narrow
neck or typically fusoid-ventricose. When revived in KOH they were
seen to have dull-brown homogeneous contents. This almost certainly indicates that the gills had colored margins-though Murrill
made no mention of such a character. It is, of course, impossible to
state whether the color was red, reddish brown, or brown. The gill
trama was homogeneous and sordid brownish or yellow in iodine.
The pileus is characterized by a distinct pellicle, the threads of which
have numerous short rodlike projections scattered over their walls.