becoming pinkish in age. The spores on paper are very light
salmon-color. They are globose or rounded in outline, 5-7 angled, with
an oil globule, 8-10u, in diameter.

The stem is of the same color as the pileus, but lighter, striate,
hollow, somewhat twisted, and enlarged below. The above accurate
description was taken from Atkinson's Studies of American Fungi. The
plants were found near a slate cut on the B. & O. railroad near
Chillicothe. Not edible. This species and E. grisea are very closely
related. The latter is darker in color, with narrower gills, and has a
different habitat.

_Entoloma subcostatum. Atkinson n. sp._

[Illustration: Plate XXX. Figure 198.--Entoloma subcostatum.

Mature plants showing broad gills and very thin flesh, also fibrous
striate stems.]

Subcostatum means somewhat ribbed, referring to the gills.

Plants gregarious or in troups or clusters, 6-8 cm. high; pileus 4-8
cm. broad; stems 1-1.5 cm. thick.

The pileus is dark-gray to hair-brown or olive-brown, often subvirgate
with darker lines; gills light salmon-color, becoming dull; stem colored
as the pileus, but paler; in drying the stems usually become as dark as
the pileus.

Pileus subviscid when moist, convex to expanded, plane or subgibbous,
not umbonate, irregular, repand, margin incurved; flesh white, rather
thin, very thin toward the margin.

Gills are broad, 1-1.5 cm. broad, narrowed toward the margin of the
pileus, deeply sinuate, the angles usually rounded, adnexed, easily
becoming free, edge usually pale, sometimes connected by veins,
sometimes costate, especially toward the margin of the pileus.

Basidia four-spored. Spores subglobose, about six angles, 8-10u in
diameter, some slightly longer in the direction of the apiculus,
pale-rose under the microscope.

Stem even, fibrous striate, outer bark subcartilaginous, flesh white,
stuffed, becoming fistulose.

Odor somewhat of old meal and nutty, not pleasant; taste similar.

Related to E. prunuloides, Fr., and E. clypeatum, Linn. Differs from the
former in dark stem and uneven pileus, differs from the latter in being
subviscid, with even stem, and pileus not umbonate and much more
irregular, and differs from both in subcostate gills. _Atkinson_.

The specimens in Plate XXX grew in grassy ground on the campus of the
Ohio State University, Columbus, Ohio. They were collected by R. A.
Young and photographed by Dr. W. A. Kellerman, and through his courtesy
I publish