North American species of Mycena.

460 NORTH AMERICAN SPECIES OF MYCENA

pearly, slightly depressed about the pale-avellaneous umbo, margin
very thin, entire, concolorous: lamellae adnate to a collar, subdistant,
rather broad, white with a pearly tint: stipe cylindric, equal, curved,
smooth, glabrous, pearly, avellaneous at the base, 1.5 cm. long, 1 mm.
thick.
"Type collected on decayed wood under tree ferns at Morce's
Gap, Jamaica, 1500 m. elevation, December 29, 30, January 2, 1908-9,
W. A. & Edna L. Murrill 731 (herb. N. Y. Bot. Gard.).
"Distribution: Known only from the type locality."
The type was examined, and its spores were found to be smooth,
hyaline, ellipsoid, and 7-8 X 5-6 u. The iodine reaction was not
obtained. The pileus trama was characterized by a gelatinous layer
150-200, thick, but the gill edges did not gelatinize. The cheilocystidia were not completely visible. The projecting portion was
subsaccate to broadly fusoid-ventricose and smooth. They were
12-20 /u broad and projected 26-32 Au. In the bit of stipe examined
no gelatinous sheath was evident. The spores, broad cheilocystidia,
and thick pellicle of the pileus should enable one to recognize this
fungus when it is again collected.
MYCENA PUBESCENS Murrill
Mycologia, 8: 221. 1916
Prunulus pubescens Murrill, North Am. Flora, 9: 341. 1916.
Illustrations: Text figs. 55, no. 10 (p. 451); 56, nos. 1-6.
"Pileus convex, gregarious, 8-12 mm. broad; surface smooth, dry,
minutely downy, dark-brown, margin entire, not striate, concolorous:
lamellae adnate, inserted, narrow, pure-white: stipe cylindric, equal,
tough, white and distinctly pubescent, especially above, brownish
at the base, 3 cm. long, 1 mm. thick.
"Type collected on decayed wood at Moore Town, Jamaica,
November 22, 1902, F. S. Earle 563 (herb. N. Y. Bot. Gard.).
"Distribution: Known only from the type locality."
The type has spores 4.5-5 X 3-3.5 A, which are smooth, hyaline,
ellipsoid, and nonamyloid. The basidia measure 18-20 X 3-4, and
are four-spored. Pleurocystidia and cheilocystidia are very abundant
and similar in size and shape. They measure 54-75 (98) X 8-15
(20) tI, and have slightly incrusted apices and often somewhat thick