iptical,
6x4-5u.

Rather common about Chillicothe on the ground about old stumps.

_Polyporus arcularius. Batsch._

[Illustration: Figure 336.--Polyporus arcularius. Two-thirds natural
size, showing dark brown and depressed center; also dark brown stems.]

The pileus is dark-brown, minutely scaly, depressed in the center,
margin covered with stiff hairs.

The tube surface is of a dingy cream color, openings oblong, almost
diamond-shaped, resembling the meshes of a net, the meshes being smaller
on the margin, shallow, simply marked out at the top of the stem.

The stem is dark-brown, minutely scaly, mottled, with a ground work of
cream-color; hollow. Common in the spring of the year on sticks and
decayed wood in fields or in old clearings. It is quite generally
distributed. Edible but tough.

_Polyporus elegans. Fr._

The pileus is fleshy, soon becoming woody; expanded, even, smooth,
pallid.

Pores are plane, minute, nearly round, pallid, yellowish-white.

The stem is eccentric, even, smooth, pallid; base from the first
abruptly black. This is quite common on rotten wood in the forests. It
resembles P. picipes both in appearance and habitat.

_Polyporus medulla-panis. Fr._

Effused, determinate, subundulate, firm, smooth, white, circumference
naked, submarginate, wholly composed of middle sized, rather long,
entire pores, the whole becoming yellowish in age.

I found this species on an elm log along Ralston's Run.

_Polyporus albellus. Pk._

The pileus is thick, sessile, convex or subungulate, subsolitary, two to
four inches broad, one to one and a half thick, fleshy, rather soft; the
adnate cuticle rather thin, smooth or sometimes slightly roughened by a
slight strigose tomentum, especially toward the margin; whitish, tinged
more or less with fuscus; flesh pure white, odor acidulous.

The pores are nearly plane, minute, subrotund, about two lines long;
white, inclining to yellowish, the dissepiments thin, acute.

The spores are minute, cylindrical, curved, white, .00016 to .0002 inch
long. _Peck._

This species is quite common here and is very widely distributed in the
United States.

_Polyporus epileucus. Fr._

This is quite a large and beautiful plant. It apparently grows without a
stem, its color being an unequal gray. The pileus is somewhat
coriaceous, firm, pulvinate, villous.

The pores are round, elongated, obtuse, entire, white.

This is not common with us, but I have met i