North American species of Mycena.

EUMYCENA: LACTIPEDES

145

basidia four-spored, 28-30 X 6-7 ',; cheilocystidia numerous, forming
a sterile band, narrowly fusoid, smooth, contents dark reddish, 30-40
X 6-8 pt; pleurocystidia absent or rare, similar to cheilocystidia; gill
trama yellowish to very faintly vinaceous brown in iodine; pileus
trama consisting of a thin pellicle of narrow hyphae filled with a darkreddish substance, a region of vesiculose cells beneath the pellicle
and the remainder of narrower floccose hyphae, both regions beneath
the pellicle becoming very faintly vinaceous brown in iodine; stipe
tissue dark vinaceous brown in iodine.
Habit, habitat, and distribution.-Gregarious on leaves or subcespitose in beech and beech-hemlock forests during the summer and fall;
Connecticut, New York, Ohio, and Michigan.
Material studied.-Smith, 936, 955, 972, 2381. Atkinson, 3933,
5029. Stuntz, 831. Walters, November, 1941, Cleveland, Ohio.
Observations.-The color of the pileus varies from dark lateritious
to testaceous, and in age the sordid yellow margin is quite distinctive.
The dull-yellow gills with their dark borders are also unusual. The
stipe may become nearly glabrous, and in such specimens there is a
slight resemblance to large forms of M. subsanguinolenta.
61. MYCENA SUBSANGUINOLENTA A. H. Smith
Mycologia, 31: 280. 1939
Illustrations:
Plate 16 A; Text fig. 13, no. 11 (p. 148).
Smith, Mycologia, 31, fig. 1 E (spores).
Pileus 10-25 mm. broad, conic, becoming obtusely conic-campanulate, in age sometimes nearly plane but always with an abrupt obtuse
umbo, margin appressed against the stipe when young, surface hoary
at first, soon naked, moist, translucent-striate, in age sulcate to the
disc, color "burnt umber" near and on the disc, paler and near "vinaceous buff" on the margin, in age a strong yellowish cast is evident
throughout; flesh thin, yellowish or sometimes reddish under the disc,
pliant, when cut exuding a watery orange-yellow juice, odor and taste
mild; lamellae ascending-adnate with a decurrent tooth, distant to
subdistant, 17-20 reach the stipe, moderately broad (4 mm.), faces
pale incarnate, edges dark reddish brown; stipe 3-8 cm. long, 1-2 mm.
thick, equal, fragile, hollow, base sparsely strigose with whitish hairs,
apex hoary-pruinose but soon naked, color pallid incarnate or concolorous with pileus margin, in age with a yellowish cast, when broken