th age,
often changing to pinkish, with a brown tinge where bruised.

The stem is solid, equal, and covered with a cottony layer of
mycelium-threads like the pileus, though often paler. The spores are
ochraceous, 15-18x6-8u. The plants are two to four inches broad, and
one and a half to three inches high. Found from July to October.

_Boletinus cavipes. Kalchb._

HOLLOW-STEMMED BOLETINUS. EDIBLE.

[Illustration: Figure 314.--Boletinus cavipes.]

Cavipes is from two Latin words meaning a hollow stem.

The pileus is broadly convex, rather tough, flexible, soft, subumbonate,
fibrillose-scaly, tawny-brown, sometimes tinged with reddish or
purplish, flesh yellowish. The tubes are slightly decurrent, at first
pale-yellow, then darker and tinged with green, becoming
dingy-ochraceous with age. The stem is equal or slightly tapering
upward, somewhat fibrillose or floccose, slightly ringed, hollow,
tawny-brown or yellowish-brown, yellowish at the top and marked by the
decurrent dissepiments of the tubes, white within. Veil whitish, partly
adhering to the margin of the pileus, soon disappearing. The spores are
8-10x4u. _Peck_, in Boleti of the U. S.

This plant grows in New York and the New England states, under pine and
tamarack trees. The caps are convex, covered with a tawny-brown
fibrillose tomentum. The stems of those I have seen are hollow from the
first. The plants in Figure 314 were sent me from Massachusetts by Mrs.
Blackford.

_Boletinus porosus._ (_Berk._) _Pk._

[Illustration: Figure 315.--Boletinus porosus. Two-thirds natural size.
Caps nut-brown, yellowish-brown or olivaceous.]

These form a small but interesting species, not usually exceeding three
and a half inches in diameter nor more than two inches in height.

The cap is somewhat fleshy, nut-brown, or yellowish-brown, shading to
olivaceous in color in most of the specimens which I have found; when
fresh and moist, somewhat sticky and shining. The margins are thin,
rather even, and inclined to be involute; the shape of the cap is more
or less irregular, in many cases almost kidney-shaped.

The stem is laterally attached, tough, and gradually expands into the
pileus which it resembles in color; it is markedly reticulated at the
top by the decurrent walls of the spore-tubes. The spore-surface is
yellow, the tubes arranged in radiating rows, some being more prominent
than others, the partitions often assuming the form of gills which
branch and are