North American species of Mycena.

EUMYCENA: DEMINUTIV5AE

127

States and Manitoba in Canada. A two-spored form has been found
in Washington. The species does not appear to be rare, but it is
difficult to find sufficient specimens to justify a critical study.
Material studied. Smith, 491, 779, 784, 913, 14170, 16954. Bisby,
Winnipeg, Manitoba. Mains, 32-288, 34-150.
Observations.-The two-spored form was collected in the Olympic
Mountains of Washington. The spores measure 8-10 X 4.5-5 jt,
and no positive amyloid reaction was obtained when they were
tested with iodine. The gills appeared to be fairly close, and 12-14
reached the stipe; they were 1.5-2 mm. broad.
The consistency is relatively tough for such a small species. The
spores either remain hyaline or appear very faintly grayish in iodine.
The latter reaction may be caused by the surrounding medium in the
mounts. In view of the nonamyloid reaction of all other parts of the
fruiting body, this character needs further study, preferably on spore
prints which have been dried for some time.
49. MYCENA SUBSUPINA A. H. Smith
Mycologia, 29: 340. 1937
Illustrations: Plate 10 D; Text fig. 10, nos. 3, 5 (p. 125).
Pileus 3-7 mm. broad, narrowly to broadly conic, not expanding,
margin appressed against the stipe when young and flaring somewhat
in age, surface covered with a delicate bloom but soon naked and
polished, moist, hardly striate, becoming slightly sulcate in age,
color near "mummy brown" when young, disc sometimes darker,
"buffy brown" at maturity or with an ochraceous tint, margin pale
avellaneous to whitish in age, sometimes pallid gray or watery grayish
brown over all in age, hardly hygrophanous, fading slowly to sordid
ashy brown; flesh thin, brownish, rather tough, odor and taste mild;
lamellae ascending-adnate or with a tooth, distant, 10-13 reach the
stipe, narrow to moderately broad (1 mm.), white to pale grayish,
edges whitish; stipe 1-2 (3) cm. long, 1 mm. thick, equal, decumbent,
rather tough and cartilaginous with a rather large hollow, glabrous
and polished except for the white-strigose base, concolorous with the
pileus, base not rooting.
Spores broadly ellipsoid, (8) 9-11 (12) X 5.5-7 (7.5) i, strongly
amyloid; basidia two- and four-spored; 18-20 X 7-8 A; pleurocystidia
rare to absent, if present similar to cheilocystidia; cheilocystidia abundant, fusoid-ventricose, the apices acute or obtuse and in some