triate, brown
or umber, tinged with pink.

The gills are free or minutely adnexed, slightly ventricose, white or
paler than the pileus, crowded.

The stem is hollow, juicy, smooth, filiform, rather brittle, whitish or
brownish. Found in woods on leaves, after a rain, from July to October.

_Mycena stannea. Fr._

THE TIN-COLORED MYCENA.

[Illustration: Figure 92.--Mycena stannea. Natural size. Caps white,
sometimes smoky.]

Stannea pertaining to the color of tin. This is a delicate species that
grows in the woods in tufts on rotten wood in damp places. The general
character is shown in the illustration, being nearly white but many of
the pilei are somewhat smoky.

The pileus is firm, membranaceous, bell-shaped, then expanded, smooth,
very slightly striate, hygrophanous, quite silky, tin-color.

The gills are firmly attached to the stem, with a decurrent tooth,
connected by veins, grayish-white.

The stem is smooth, even, shining, becoming pale, at length compressed.
This species differs from Mycena vitrea in having a tooth to the gills.
May, June, and July.

_Mycena vitrea. Fr._

Vitrea, glassy. This plant is quite fragile. The pileus is
membranaceous, bell-shaped, livid-brown, finely striate, no trace of
umbo.

The gills are firmly attached to the stem, not connected by veins,
distinct, linear, whitish.

The stem is slender, slightly striate, polished, pale, base fibrillose.
This species differs from M. aetites and M. stannea in gills not having a
decurrent tooth and not being connected by veins.

_Mycena corticola. Fr._

[Illustration: Figure 93.--Mycena corticola.]

Corticola means dwelling on bark.

It is one of the smallest of the Mycenas, the pileus being about two to
four lines across, thin, hemispherical, obtuse, becoming slightly
umbilicate, deeply striate, glabrous or flocculosely pruinose, gray,
tan, or brownish.

The gills are attached to the stem, with slight decurrent tooth, broad,
rather ovate, pallid.

The stem, is short, slender, incurved, glabrous or minutely scurfy,
somewhat paler than the pileus. The spores are elliptical, 5-6x3u;
cystidia obtusely fusiform, 50-60x8-10u.

These plants are found on the bark of living trees. After rains I have
seen the bark on the shade trees along the walks in Chillicothe,
literally covered with these beautiful little plants. The plants in
Figure 93 were taken from a maple tree the 4th of December. They are
very close allied to M. hie