North American species of Mycena.

EUMYCENA: DEMINUTIVAE

97

strongly decurrent, white; stem filiform, glabrous, white, attached
to the matrix by a few radiating white filaments; spores broadly
elliptic or subglobose,.00016 to.0002 in. long.
"Pileus 1 to 3 lines broad; stem about 1 in. long, scarcely thicker
than a thread.
"Sticks and fallen leaves in woods. Gansevoort. July.
"The species is related to Omphalia Fibula. It should also be
cautiously separated from Mycena immaculata."
Material studied.-Kauffman, August 20, 1919, Cabin John,
Maryland.
Observations.-I have been unable to locate the type. The almost
globose spores, however, should separate it readily from other small
white agarics of similar appearance. It is closest, apparently, to
M. albidula. The decurrent gills distinguish it from M. Rickenii.
29. Mycena paucilamellata, sp. nov.
Illustrations: Text fig. 6, nos. 7-8 (p. 85).
Pileus 1-1.5 mm. latus, conico-campanulatus, candidus, glaber;
lamellae distantes, plicatae, subdecurrentes, candidae; stipes 1 cm.
longus, filiformis, candidus, pruinosus; sporae (8) 9-11 X 3-3.5 tz;
pleurocystidia et cheilocystidia fusoide ventricosa, 28-37 X 9-14 u.
Specimen typicum in Herb. Univ. Mich. conservatum. Legit A. H.
Smith, n. 3720, prope Orick, Calif., December 2, 1935.
Pileus about 1-1.5 mm. broad, conic-campanulate, the margin
connivent at first, pure shining white and opaque at all stages; flesh
membranous, white, no odor or taste evident; lamellae none or evident only as 3-5 low ridges which are somewhat decurrent on the
stipe; stipe 1 cm. long, filiform, white, pruinose above, base slightly
pubescent, the apex usually enlarged slightly, base inserted on the
redwood twigs and needles.
Spores (8) 9-11 X 3-3.5 Au, cylindric to subaciculate, tapered to
a long point at the base, smooth, hyaline, amyloid; basidia fourspored; cystidia scattered through the hymenium and abundant over
the apex of the stipe, 28-37 X 9-14,, fusoid-ventricose with obtuse
apices; gill trama and pileus trama similar, yellowish in iodine; pileus
surface covered with enlarged cells (15-30 X 10-16,i), the upper surfaces of which give off numerous short rodlike projections, no true
pellicle present.