North American species of Mycena.

156 NORTH AMERICAN SPECIES OF MYCENA

M. lactea cannot apply to the fungus Peck named M. crystallina,
and there is no doubt whatever in my mind that Fries's illustration
does not apply to M. crystallina (M. delicatella of this work; see
page 161). For additional comments see M. Rickenii also (p. 158).
66. Mycena translucentipes (Murr.), comb. nov.
Omphalopsis translucentipes Murrill, North Am. Flora, 9: 312. 1916.
Omphalia translucentipes Murrill, Mycologia, 8: 220. 1916.
"Pileus very thin and delicate, convex, depressed at the center,
gregarious to subcespitose, scarcely reaching 1 cm. broad; surface
glabrous, not striate, pure-white, margin entire, concolorous: lamellae
simple, short-decurrent, subdistant, rather narrow, white: stipe very
slender, cylindric, smooth, glabrous, white, subtranslucent, 2 cm.
long, less than 1 mm. thick.
"Type collected on an old stump in wet woods in City Park, New
Orleans, Louisiana, September 6, 1908, F. S. Earle 72 (herb. N. Y.
Bot. Gard.).
"Habitat: Logs or stumps in wet woods.
"Distribution: Vicinity of New Orleans, Louisiana."
The type consists of a good collection. The spores measure 4-5 X
3.5-4,u and are broadly ovoid, hyaline, smooth, and amyloid. The
basidia are apparently four-spored, but, because of the very fine
sterigmata and the failure of most of the hymenium to revive, the
point could not be determined positively. No pleurocystidia were
seen. The cheilocystidia measured 26-37 X 8-19 L, and had obtuse
apices. They were smooth, hyaline, and fusoid-ventricose. The
tramae of the pileus and gills each appeared to be homogeneous and
turned yellowish in iodine. Neither revived very well. One might
question whether or not this species is identical with M. papillata.
The spore sizes of the two are about the same. The cespitose habit
of M. translucentipes, its southern distribution, and its truly diaphanous character seem sufficient to characterize it.
67. MYCENA DELECTABILIS (Pk.) Saccardo
Syll. Fung., 5: 262. 1887
Agaricus (Mycena) delectabilis Peck, Ann. Rep. New York State Mus., 27:
93. 1875.
Prunulus delectabilis Murrill, North Am. Flora, 9: 323. 1916.