North American species of Mycena.

440 NORTH AMERICAN SPECIES OF MYCENA

same results as Kiihner, and was inclined to doubt Kauffman's observations. On western collecting trips during both 1937 and 1939
I found the species rather frequently, and in every collection the stipes
of young fruiting bodies were decidedly viscid. The gelatinous layer
in question can be demonstrated under the microscope from fresh
specimens, but not at all or only with great care from dried material.
During the course of my study of the type I found that the collection was a mixture of two species, M. tenax and M. quinaultensis,
but it was evident that Kauffman's notes were taken from carpophores of only the one species, M. quinaultensis. Since there is no
confusion of concept, Article 64 of the International Rules of Nomenclature does not apply, and there is no reason for changing the name.
The collection reported from Nova Scotia by Smith and Wehmeyer
as M. quinaultensis has been found to be M. tenax. The former is
readily distinguished from the latter by the different gill edge, the
very thin gelatinous pellicle on the pileus, and the lack of a disagreeable odor.
226. MYCENA TENAX A. H. Smith
Mycologia, 28: 414. 1936
Illustrations:
Plate 97; Text fig. 52, nos. 4, 6 (p. 419).
Smith, Mycologia, 28, fig. 2, no. 1; fig. 3, nos. 4-5.
Pileus 1-3 cm. broad, oval to convex at first, in age broadly conic
or obtusely umbonate, disc flattened or slightly depressed at maturity, margin appressed against the stipe when young and somewhat
flared in age, with a thick tenacious separable pellicle, surface glabrous, lubricous to subviscid, in age striate to the abruptly translucent-watery disc, opaque when faded and somewhat sulcate, color
"fuscous" to "hair brown" and with a pale-grayish margin when
young, becoming pale watery gray in age; flesh pliant, tough, pallid,
odor and taste strongly rancid-farinaceous or somewhat resembling
those of a green watermelon or a watermelon rind; lamellae adnate or
slightly toothed, close, 24-27 reach the stipe, narrow (2-3 mm.),
pallid to grayish, edges even; stipe 5-7.5 cm. long, 2-3 mm. thick,
equal, hollow, tenacious, glabrous, subviscid to viscid, pruinose toward
the apex, base white-strigose, concolorous with the pileus or paler.
Spores narrowly ellipsoid, pointed at one end, 6.5-8 X 3.5-4 g,
amyloid; basidia four-spored, 30-34 X 5-6 u; cheilocystidia clavate