North American species of Mycena.

452 NORTH AMERICAN SPECIES OF MYCENA
the outlines usually a little irregular, 44-66 X 9-12,; gill trama
homogeneous and nonamyloid; pileus trama homogeneous, pellicle
not differentiated, nonamyloid.
Habit, habitat, and distribution.-Scattered on wet soil among liverworts and mosses, September 21, 1941; Mt. Angeles, Olympic
Mountains, Washington. Known only from the type collection.
Observations.-Under ordinary magnifications it is difficult to see
clearly the markings of the spore wall. Under higher powers, however, the details are readily visible. The structure of the wall is
similar to that of M. bisphaerigera except that the outer amyloid
epispore is lacking and the secondary wall is not as thick. The close
relationship of the two species is obvious, however. M. cineraria is
readily distinguished by its large cystidia. In stature it is almost
identical with Lange's illustration of Omphalia picta var. concolor.
Its colors are dull and intermediate between the true browns and the
grays and hence cannot be considered of more than secondary importance.