especially at the base. The entire surface is marked
with reddish or pinkish dots.

[Illustration: PLATE 60, FIGURE 169.--Boletus vermiculosus. Cap brown to
gray or buff; tubes yellowish with reddish brown mouths; flesh quickly
changes to blue where wounded (natural size, sometimes larger).
Copyright.]

Figure 168 is from plants (No. 4085 C. U. herbarium) collected at
Blowing Rock, N. C., during September, 1899.

=Boletus vermiculosus= Pk.--This species was named _B. vermiculosus_
because it is sometimes very "wormy." This is not always the case,
however. It grows in woods on the ground, in the Eastern United States.
It is from 6--12 cm. high, the cap from 7--12 cm. broad, and the stem
1--2 cm. in thickness.

The =pileus= is thick, convex, firm, smooth, and varies in color from
brown to yellowish brown, or drab gray to buff, and is minutely
tomentose. The flesh quickly changes to blue where wounded, and the
bruised portion, sometimes, changing to yellowish. The =tubes= are
yellowish, with reddish-brown mouths, the tube surface being rounded,
free or nearly so, and the tubes changing to blue where wounded. The
=stem= is paler than the pileus, often dotted with short, small, dark
tufts below, and above near the tubes abruptly paler, and sometimes the
two colors separated by a brownish line. The stem is not reticulated.
Figure 169 is from a photograph of plants (No. 4132 C. U. herbarium)
collected at Blowing Rock, N. C., during September, 1899.

=Boletus obsonium= (Paul.) Fr.--This species was not uncommon in the
woods at Blowing Rock, N. C., during the latter part of August and
during September, 1899. It grows on the ground, the plants usually
appearing singly. It is from 10--15 cm. high, the cap 8--13 cm. broad,
and the stem 1--2 cm. in thickness, considerably broader at the base
than at the apex.

The =pileus= is convex to expanded, vinaceous cinnamon, to pinkish
vinaceous or hazel in color. It is soft, slightly tomentose, and when
old the surface frequently cracks into fine patches showing the pink
flesh beneath. The thin margin extends slightly beyond the tubes, so
that it is sterile. The flesh does not change color on exposure to the
air. The =tubes= are plane, adnate, very slightly depressed around the
stem or nearly free, yellowish white when young, becoming dark olive
green in age from the color of the spores. The tube mouths are small and
rotund. The =spores= caught on white paper are dark olive green. Th