=B. subsanguin´eus= Pk.—_sub_ and _sanguineus_, bloody. (Plate CXVI,
fig. 4, p. 420.) =Pileus= convex or slightly depressed in the center,
glabrous, viscid, bright-red or scarlet. =Flesh= thick, firm but
flexible, white, slowly changing to a pale brownish-lilac on exposure to
the air, taste slightly bitter. =Tubes= very short, 2–4 mm. long,
adnate, but often separating from the stem with the expansion of the
pileus, reddish, the mouths minute, stuffed at first, pinkish, then
brownish-yellow, changing to a light-brown where wounded. =Stem= short,
thick, uneven, often tapering downward, streaked with red, pale-yellow
at the top, white at the base, marked at the top by the decurrent walls
of the tubes.
=Pileus= 2.5–10 cm. broad. =Stem= 2.5–5 cm. long, 2–4 cm. thick.
Solitary, gregarious or cespitose. Under beech trees. West Philadelphia,
Pa. August. _C. McIlvaine._
This is a very showy species, easily recognized by its bright-red viscid
pileus and its short, thick and uneven or somewhat lacunose stem. It is
closely related to the European B. sanguineus With., from which it is
separated by its minute tubes, its uneven stem and the brownish hues
assumed where wounded.
The spore characters of this and the four succeeding species are
unknown, but the other characters are quite distinctive and apparently
sufficient for the recognition of the species. The descriptions have
been derived from colored figures and other data furnished by Mr.
McIlvaine, who says all are edible. _Peck_, Bull. Torrey Bot. Club, No.
27.
When slowly stewed for thirty minutes, there is no better Boletus.
PULVERULENTI.
=Pileus= clothed with a yellow dust or a yellow powdery down. =Stem=
more or less yellow powdered, neither bulbous nor distinctly
reticulated.
The species which constitute this tribe are easily distinguished from
all others by the sulphur-colored pulverulence which coats the pileus
and stem like a universal veil. They appear thus far to be peculiar to
this country. Though strongly resembling each other in the tribal
character they are very diverse in other respects. One species, by its
viscidity, connects with the preceding tribe; another by its differently
colored tube mouths is related to the Luridi; and the third is peculiar
in its ligneous habitat.
Plant growing on the ground 1
Plant growing on wood B. hemichrysus