and spreading,
quite hairy, imbricated, more or less zoned, quite tough, often having a
greenish tinge from the presence of a minute algae; naked, juiceless,
yellowish, unchanged when bruised or scratched. The hymenium is
pale-yellow, smooth, margin entire, often lobed. I find it usually on
hickory logs.

_Stereum fasciatum. Schw._

Fasciatum means bands or fillets. Pileus is coriaceous, plane, villous,
zonate, grayish; hymenium, smooth, pale-red. Growing on decayed trunks.
Common in all of our woods.

_Stereum sericeum. Schw._

[Illustration: Figure 383.--Stereum sericeum.]

Sericeum means silky or satiny; so called from its satin lustre. The
plant is very small and easily overlooked, usually growing in a
resupinate form; sessile, orbiculate, free, papyraceous, with a bright
satin lustre, shining, smooth, pale-grayish color.

The plant grows on both sides of small twigs as is shown in the
photograph. I do not find it on large trunks but it is quite common on
branches. No one will fail to recognize it from its specific name.

When I first observed it I named it S. sericeum, not knowing that there
was a species by that name. I afterwards sent it to Prof. Atkinson and
was surprised to find that I had correctly named it.

_Stereum rugosum. Fr._

Rugosum means full of wrinkles.

Broadly effused, sometimes shortly reflexed; coriaceous, at length thick
and rigid; pileus at length smooth, brownish.

The hymenium is a pale grayish-yellow, changing slightly to a red when
bruised, pruinose. The spores are cylindrico-elliptical, straight,
11-12x4-5u. _Massee._

This is quite variable in form, and agrees with S. sanguinolentum in
becoming red when bruised; but it is thicker and more rigid in
substance, its pores are straighter and larger.

_Stereum purpureum. Pers._

Purpureum means purple, from the color of the plant.

Coriaceous but pliant, effuso-reflexed, more or less imbricated,
tomentose, zoned, whitish or pallid.

The hymenium is naked, smooth, even; in color a pale clear purple,
becoming dingy ochraceous, with only a tinge of purple, when dry. The
spores are elliptical, 7-8x4u.

I found the plant to be very abundant in December and January, in
1906-7, on soft wood corded up at the paper mill in Chillicothe, the
weather being mild and damp.

_Stereum compactum._

Broadly effused, coriaceous, often imbricated and often laterally
joined, pileus thin, zoned, finely strigose, the zones grayish