148 BULLETIN OF THE NEW YORK STATE MUSEUM 
Boletus scaber Fr. 
SCABROUS-STEMMED BOLETUS 
Hym. Eur. p. 515. Syl. Fung. Vol. VI, p. 41 
Pileus convex, glabrous, viscid when mozst, at length rugu- 
lose or rivulose; tubes free, convex, white, then sordid, their 
mouths minute, rotund; stem solid, attenuated above, rough- 
ened with fibrous scales; spores oblong-fusiform, snuff-brown, 
.00055 to .0007 in. long, .c0016 to .00025 broad. 
Pileus 1 to 5 in. broad; stem 3 to 5 in. long, 3 to 8 lines 
thick. The . 
Woods, swamps and open places. Very common and ap- 
pearing through summer and autumn. 
This may fairly be called our most common and varia- 
ble species: “It is recorded in nearly every Vocal ictron 
fungi. The pileus is convex, hemispherical or even subconi- 
cal. It may be glabrous, minutely tomentose, subvelvety or 
squamulose. The flesh is white or whitish and sometimes 
slightly changeable where wounded. The tubes are gener- 
ally rather long and with a rounded or convex surface. The 
stem is distinctly scabrous or roughened with small blackish- 
brown or reddish dots or scales, the ground color generally 
being whitish, grayish or pallid. The spores have been de- 
scribed as pale-brown and light-yellowish. When caught in 
a mass on white paper they appear to me to approach snuff- 
brown, being a paler brown than those of Agaricus cam- 
pestres and darker than those of Boletus ornatipes. The 
viscidity of the pileus is not always clearly discernible. In- 
deed the pileus is often quite as dry as in B. verszpelles. 
When moistened by heavy rains it sometimes is smooth and 
clammy to the touch but scarcely viscid. Several varieties 
have been indicated which are expressive of the variations 
in the color of the pileus. 
Var. ¢estaceus. Pileus brick-red. 
