haped and more completely reticulated.

The pileus in the young plant is much more highly colored and fades out
in age, but the margin does not become paler than the disk as is often
the case with B. edulis. The specimens in Figure 290 were found in
Michigan and photographed by Dr. Fischer. They are quite as good as B.
edulis.

_Boletus Sullivantii. B. & M._

[Illustration: Figure 291.--Boletus sullivantii.]

Sullivantii is named in honor of Professor Sullivant, an early Ohio
botanist.

The pileus is three to four inches broad, hemispherical at first,
glabrous, reddish-tawny or brown, brownish when dry, cracked in squares.

The tubes are free, convex, medium size, angular, longer toward the
margin, their mouths reddish.

The stem is solid, violaceous at the thickened base, red-reticulated at
the apex, expanded into the pileus.

The spores are pallid to ochraceous, oblong-fusiform, 10-20u long.
_Peck's_ Boleti in U. S.

This species is very close to Boletus scaber and Boletus edulis. It
differs from B. scaber in its reticulated stem and from B. edulis in its
larger tubes. The specimens in Figure 291 were found by Hambleton Young
near Columbus, and were photographed by Dr. Kellerman.

_Boletus parvus. Pk._

Parvus means small; so named from the smallness of the plant.

The pileus is one to two inches broad, convex, becoming plane, often
slightly umbonate, subtomentose, reddish. Flesh yellowish-white, slowly
changing to pinkish when bruised.

The tubes are nearly plane, adnate, their mouths rather large, angular,
at first bright-red, becoming reddish-brown.

The stem is equal or slightly thickened below, red, from one to two
inches long. The spores are oblong, 12.5x4u.

They are found in thin woods, July and August.

_Boletus eximius. Pk._

THE SELECT BOLETUS. EDIBLE.

[Illustration: Figure 292.--Boletus eximius. Two-thirds natural size.]

Eximius means select.

The pileus at first is very compact, nearly round, somewhat covered with
a mealy substance, purplish-brown, or chocolate color, sometimes with a
faint tinge of lilac, becoming convex, soft, smoky red, or
pale-chestnut, flesh grayish or reddish-white.

The tube surface is at first concave or nearly plane, stuffed, colored
nearly like the pileus, becoming paler with age and depressed around the
stem, the mouths minute, round.

The stem is stout, generally short, equal or tapering upward, abruptly
narrowed at the base, minutely brann