North American species of Mycena.

172 NORTH AMERICAN SPECIES OF MYCENA

lamellae close, narrow, widest at the middle, pointed at the outer
extremity, sharply uncinate at the inner, whitish or yellow with a
flesh-colored tint; stem slender, tough, hollow, smooth, whitish.
"Plant 1'-1.5' high, pileus 3"-5" broad, stem.5" thick.
"Old mossy logs and rotten wood in woods. Greig. September.
"The papilla of the pileus is sometimes absent."
I have seen fresh material of one collection of this species from
near Ann Arbor. It was collected by a member of a mycology class
in 1930, but the dried specimens were lost. The pilei measured 10 -15 mm. broad, and the discs were obtuse. Neither color notes nor
a good description was obtained. However, the spores measured
6-8, and were subglobose, with a conspicuous oblique apiculus.
Only cheilocystidia were observed. Among Kauffman's collections
I found one (B. B. Kanouse, October 23, 1926, at Ann Arbor) which
also belongs here. Kauffman had placed it in M. adonis. Sections
of Peck's type have been made, and the basidia were found to be fourspored. The spores were subglobose with an oblique apiculus and
measured 5-6.7 X 5-6 gu. The cheilocystidia were smooth, obtuse,
and fusoid-ventricose. A few were present on the sides a short distance from the gill edge, but they could hardly be classed as pleurocystidia. No others were found on the faces of the gills. The species
is best separated from M. roseipallens by its spores.
77. MYCENA ROSEIPALLENS Murrill
Mycologia, 8: 221. 1916
Prunulus roseipallens Murrill, North Am. Flora, 9: 324. 1916.
Illustrations:
Plate 20; Text fig. 17, nos. 1-2.
Bresadola, Icon. Mycol., 5, pl. 229 (as M. floridula).
Smith, Am. Journ. Bot., 22, pl. 2, fig. 1.
Pileus 5-18 (20) mm. broad, obtusely conic when young, the
margin either appressed against the stipe or slightly incurved, becoming campanulate to expanded-umbonate, the margin sometimes
flaring and sometimes recurved in age and often becoming lobed, the
umbo sometimes disappearing in age, pruinose at first but soon naked
and moist, translucent-striate, color dark to light brick red at first,
becoming yellowish incarnate or yellowish tan in age, the margin
sometimes whitish ("ferruginous" to "rufous" at first, paler in age);
flesh thin, not markedly fragile, pallid incarnate to yellowish or