tubes set squarely against the
stem, being small, nearly round, yellowish or ochraceous, becoming
darker in age.

The stem is rather long, nearly equal, about the color of the cap,
dotted both above the ring and below it; the ring is membranaceous,
quite variable and persistent, usually collapsing as a narrow ring on
the stem. The spores are ochraceous-brown, oblong or elliptical,
8-10x4-5.

Prof. Atkinson has made a careful study of both the American and the
European plants called in this country B. luteus and B. subluteus, and
has come to the conclusion that they should all be called B. luteus. In
distinguishing the two we usually say those having much gluten and
dotted above the ring are B. luteus, and those dotted both above and
below the ring are B. subluteus. The specimens in Figure 297 were
collected at the State Farm at Lancaster, Ohio, and photographed by Dr.
Kellerman. They are found in July and August.

_Boletus parasiticus. Bull._

[Illustration: Figure 298.--Boletus parasiticus.]

Parasiticus means a parasite; so called because it grows on a
Scleroderma. It is a small plant and quite rare.

The pileus is one to two inches broad, convex, or nearly plane, dry,
silky, becoming glabrous, soon tessellately cracked, grayish or dingy
yellow. Tubes decurrent, medium size, golden yellow.

The stem is equal, rigid, incurved, yellow within and without. The
spores are oblong-fusiform, pale-brown, 12.5-15x4u. _Peck._

The tubes are rather large and unequal, and inclined to run down upon
the stem.

This plant was found near Boston, Mass., by Mrs. E. B. Blackford and
photographed by Dr. Kellerman. Captain McIlvaine says it is edible but
not of good flavor. It is found in July and August.

_Boletus separans. Pk._

THE SEPARATING BOLETUS. EDIBLE.

[Illustration: Figure 299.--Boletus separans. One-half natural size.]

Separans, separating, alluding to the tubes sometimes separating from
the stem by the expansion of the pileus.

The pileus is convex, thick, smooth, subshining, often pitted or
corrugated; brownish-red or dull-lilac, sometimes fading to yellowish on
the margin; flesh white and unchangeable.

Tubes at first are nearly plane, adnate, white and stuffed, then convex,
depressed around the stem, ochraceous-yellow or brownish-yellow and
sometimes separating from the stem by the expansion of the pileus.

The stem is equal or slightly tapering upward; reticulated, either
wholly or in upper part