North American species of Mycena.

EUMYCENA: ADONIDAE

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ventricose, with the apex sometimes embedded in an amorphous substance; (2) In the other they were smooth, clavate, and with the
incrustations over the broad apex. The former measure 48-54 X 8 -10 u; the latter, 32-46 X 10-18 g. The clavate individuals were not
abundant. Only the typcially fusoid-ventricose variety was found on
the gill edge. Iodine reactions were not obtained.
I have never found fresh material with the clavate pleurocystidia,
and as a result have never been certain of Peck's species. For the
last ten years, however, I have been collecting in the vicinity of Ann
Arbor a fungus which could easily pass for M. roseocandida if one
overlooks the character mentioned above. This was previously referred to M. amabilissima, but it is as distinct as M. flavescens. The
following is a description of the Michigan material:
Pileus 5-15 (25) mm. broad, obtusely conic or the disc flattened
slightly, the margin incurved slightly at first, expanding and at maturity broadly umbonate with a plane or a recurved margin, surface
smooth, glabrous, moist, and translucent, the margin translucentstriate and frequently incised, hygrophanous or only subhygrophanous, becoming opaque when faded, color pale pink ("seashell pink")
over all, soon fading (while still moist) to whitish or yellowish ("ivory
yellow"), the margin usually paler and the disc darker, the color
sometimes persisting along the margin, often white when still apparently young and moist; flesh thin and fragile, pinkish but soon white,
no odor, taste bitterish but soon mild; lamellae very narrow (1 mm. 4),
bluntly adnate or becoming slightly adnexed, close, 15-20 reach the
stipe, one to three tiers of lamellulae, pinkish like the pileus and fading
to white or yellowish, intervenose, the edges slightly pruinose; stipe
short or long, depending on the habitat, 10-15 X 1-2.5 mm. when
growing on bark of trees or in other exposed places, 3-5 cm. long,
1-2 mm. thick when growing on humus or fallen leaves, equal or
nearly so, solid but soon hollow and rather fragile, watery, terete or
compressed, base white-strigose (if growing from leaf mats often
curved and conspicuously strigose), pruinose above but soon polished
and translucent-white to yellowish toward the base, pinkish above
when young but usually fading quickly to white.
Spores 6-7 (8) X 3-3.5 t, narrowly ovoid, smooth, hyaline, nonamyloid; basidia four-spored; pleurocystidia and cheilocystidia similar
and abundant to scattered, 33-46 X 7-11 (13) t, narrowly fusoidventricose with long, slender necks and acute apices, smooth; gill
trama homogeneous, yellowish in iodine; pileus trama homogeneous