152 BULLETIN OF THE NEW YORK STATE MUSEUM 
The species is compared to Boletus scaber, from which it 
differs in its smaller tubes and smooth stem, and from both 
this and BZ. albellus it differs in the color of the tubes and in 
the yellowish flocci of the pileus. I have seen no specimens 
but on account of the color of the tubes I have placed the 
species with the Hyporhodii. 
Boletus gracilis Px. 
SLENDER BOLETUS 
Rep. 24, p. 78 
Pileus convex, glabrous or minutely tomentose, rarely 
squamulose, ochraceous-brown, tawny-brown or reddish- 
brown, flesh white; tubes plane or convex, depressed around 
the stem, nearly free, whitish, becoming pale flesh-colored, 
their mouths subrotund; stem dong, slender, equal or slightly 
tapering upward, pruinose or minutely furfuraceous, even or 
marked by slender elevated anastomosing lines which form 
long narrow reticulations; spores subferruginous, .0005 to 
.0007 in. long, .c002 to .00025 broad. 
Var. d@vipes. Stem even. 
Pileus 1 to 2 in. broad; stem 3 to 5 in. long, 2 to 4 lines 
thick. 
Woods. New York, Peck. New England, Frost. Ohio, 
Morgan. 
The slender habit separates this species from all the others 
_ here included in this tribe. Its spores are not a clear incar- 
nate in color but incline to dull ferruginous and by this 
character this and the preceding species connect this tribe 
with Versipelles. In color 4. graczlzs resembles some forms 
of B. felleus, but in size, habit and color of spores it is easily 
distinct. The tomentum of the pileus sometimes breaks 
into tufts or squamules. This is Boletus vinaceus Frost Ms. 
