North American species of Mycena.

EUMYCENA: DEMINUTIVAE

103

light the stem appears to be sprinkled with minute mealy particles
when fresh."
This is a copy of Peck's notes taken from Book 4, page 59, of his
field notes at the New York State Museum, Albany, New York.
I have examined the type and made the following observations:
The spores measure 7-8 X 5.5-7.5 li, are smooth, broadly ellipsoid,
subglobose, or subglobose with a prominent apiculus. The basidia
measure 29-32 X 6-7,, and all were two-spored. The sections revived well and many individuals with sterigmata were seen. Pleurocystidia were lacking in my sections, but the cheilocystidia, though
not conspicuous, were characteristic. They measured 31-39 X 8 -11 J, were cylindric to clavate or subventricose, and the surfaces were
covered with short, obtuse rodlike projections. Details of the pileus
trama were not obtained, and no tests were made with iodine.
I have not collected this species and know of no authentic material
other than Peck's type. In all of Kauffman's collections I found the
cheilocystidia to be smooth and fusoid-ventricose. Consequently,
his account must be regarded as a misdetermination. To judge from
his specimens, he probably had small forms of M. olida var. americana.
M. minutula, by virtue of its cheilocystidia, should be very readily
recognized among the small white species. Apparently it must be
either very rare or very sporadic in its appearance.
SUBSECTION SUBINCARNATAE
35. MYCENA PTERIGENA (Fr.) Quelet
Champ. Jura et Vosges, p. 109. 1872
Agaricus pterigenus Fries, Syst. Myc., 1: 160. 1821.
Illustrations:
Text fig. 7, nos. 4-5 (p. 91).
Fries, Icon. Sel. Hymen., 1, pl. 85, fig. 4.
Lange, Flora Agar. Dan., 2, pl. 54, H. 1936 (very good).
Pileus 2-5 mm. broad, subcylindric to obtusely conic with an
appressed margin at first, becoming broadly conic to convex, surface
glabrous, somewhat translucent-striate, color bright, often delicate
rose ("coral red") over all, gradually fading to grayish vinaceousespecially on the disc, the rose tints often persisting along the margin
or the margin whitish; flesh membranous but not fragile, odor and
taste not recorded; lamellae ascending, broadly adnate, distant,