Boletus piperatus Bull. Peppery in taste. 
Boletus miniato-olivaceus Frost. Pileus spongy, vermilion to oliva¬ 
ceous ; pale yellow flesh, changing to blue; tubes bright yellow, adnate 
or subdecurrent; stem enlarged at the top, pale yellow, brighter within, 
sometimes lurid at the base. Peck describes a common variety with the 
pileus red, at first tomentose ; stem, when young, contracted at the top; 
tubes tinged with green. Any part of the plant changes to blue when 
touched. This species is said to have caused severe illness. It is often 
confounded with the next two. 
Boletus chrysenteron Fr. Pileus soft, floccose, often areolate, the 
cracks showing the reddish tint of the flesh under the skin ; the greenish 
yellow subadnate tubes change to blue, and have large angular unequal 
mouths ; stem red or pale yellow. A variable species, brick red, brown 
red, or olivaceous. 
Boletus subtome 7 itosus L. Pileus soft, dry, tomentose, reddish brown 
or subolivaceous, often ^areolate, the cracks showing yellowish; tubes 
adnate or depressed, yellow, mouths large and angular; stem sometimes 
ribbed or furrowed, scurfy with minute dots. The tubes do not change 
color on being wounded. 
Boletus Russelli Frost. Known by its scaly reddish pileus, long red 
lacerated stem, and unchanging yellowish flesh. 
Boletus ornatipes Pk. Known by its grayish or yellowish brown 
pileus, yellow tubes and flesh, and beautifully reticulated, yellow, often 
rather slender stem. 
Boletus edulis Bull. (Accent the second syllable.) Known by its 
smooth, brownish, or reddish cap, which shows a red tint under the skin ; 
convex tubes, which are nearly free, long, minute, white, then yellow or 
greenish with age; stem very variable, but often swollen to huge 
dimensions; taste peculiarly agreeable, slightly yeasty when stale. The 
reticulations on the stem are not always prominent. (!) 
Boletus alveolatus B & C. Pileus shining crimson, often yellowish ; 
flesh white, changing to blue ; tubes with reddish mouths, pitted with 
depressions; stem with coarse red reticulations. 
Boletus luridus Schaeff. Pileus brownish ; flesh yellow, changing to 
blue; tubes free, yellow then greenish, their mouths vermilion, becoming 
orange. 
Boletus scaber Fr. Very variable, but known by its scabrous black- 
dotted stem and free tubes. B. versipellis, closely related, has a pale 
reddish cap, to the edge of which adhere fragments of the veil. ( !) 
Boletus chro?napes Frost. Known by its tapering stem, with base 
chrome yellow without and within. 
Boletus felleus Bull. Known by its white tubes, which become tinged 
with flesh color, and its bitter taste. 
Boletus castaneus Bull. Pileus velvety, cinnamon or reddish brown ; 
flesh white, not changing; tubes free, short, white or yellowish; stem 
colored like the pileus. (!) 
Strobilomyces strobilaceus Berk. Pileus convex, covered with large 
prominent blackish scales; tubes not easily separated from the cap; flesh 
changing to 1 eddish and then to blackish. Entirely distinct in appear¬ 
ance. The young specimens show a floccose veil. ( !) 
i he Boleti here noted are among the no species described by Peck. 
More complete descriptions may be found in his synopsis. Of those 
mentioned B. uiimcito-ohvciceus , B. alveolatus and B. luridus are regarded 
v.ith suspicion. In using boleti for food it should be remembered that 
they should be picked when young and firm, and used at once, for they 
are exceedingly liable to decay. Yet the firmer sorts may be readily 
dried and kept for winter use. Those marked (!) are known to be 
excellent eating. 
Cambridge, July 13, 1S97. 
HOLLIS WEBSTER, Secretary. 
