North American species of Mycena.

EUMYCENA: TYPICAE

299

glabrous except for the white-strigose base, apex naked, even, "hair
brown" toward the base, concolorous with the gills near the apex.
Spores ellipsoid, 9-13 (14) X 4-5.5 (6) gu, amyloid; basidia fourspored, 33-38 X 7-8 Iu; cheilocystidia (36) 40-54 X 9-14 1, very
abundant, obovoid and tapering to a pedicel, the apex provided with
one or several (up to five) long, cylindric prolongations (8-12 X
2-3 A), hyaline, ventricose portion smooth; pleurocystidia absent; gill
trama vinaceous brown in iodine; pileus trama with a thin pellicle,
beneath it a well-differentiated hypoderm and the remainder filamentous, all but the pellicle vinaceous brown in iodine.
Habit, habitat, and distribution.-Gregarious to subcespitose on
debris in Douglas fir and mixed conifer and alder forests during
November and June; Washington and Oregon. Kiihner (1938) has
found it in Europe. One collection from J. E. Bier, November 24,
1939, apparently belongs here.
Material studied.-Smith, 14252, 14609. Stuntz, F 419. Bier,
November 24, 1939, British Columbia.
Observations.-Although I have not seen abundant material and
only the type collection has been located in Kauffman's specimens,
I am sure that M. griseiconica is one of the larger Mycenae. It is
slightly less cartilaginous than M. galericulata but by no means as
fragile as M. Abramsii. M. Abramsii and M. griseiconica are remarkably similar in many respects, but for the present at least they
are kept separate. Some pleurocystidia have always been found in
collections of M. Abramsii. In the type they measure 60-80 X 12 -16 (20) At and are very abundant. This difference is striking when
the types of both species are compared, since Kauffman's specimens
lack pleurocystidia. On the basis of their scattered smaller pleurocystidia the eastern collections identified as Murrill's fungus are
somewhat intermediate between the two. M. Abramsii has always
impressed me as being related to M. stannea, whereas Kauffman's
specimen appears to be related to M. megaspora. Kuihner (1938),
however, has arranged M. griseiconica beside M. aetites (M. stannea
of this work), the position in which I have placed M. Abramsii.
146. MYCENA FAGETORUM (Fr.) Gillet
Les Hymen., p. 9274. 1874
Agaricus fagetorum Fries, Epicr. Syst. Myc., p. 106. 1838.
Illustrations:
Plate 62; Text fig. 35, nos. 7-8 (p. 295).