BOLETI OF THE UNITED STATES 113 
Boletus pallidus Frost 
Pate BoLetus 
Bull. Buff. Soc. 1874, p. 105 
Pileus convex, becoming plane or centrally depressed 
soft, glabrous, pallid or brownish-white, sometimes tinged, 
with red, flesh white; tubes plane or slightly depressed 
around the stem, nearly adnate, very pale or whitesh-yellow, 
becoming darker with age, changzng to blue where wounded, 
the mouths small; stem equal or slightly thickened toward 
the base, rather long, glabrous, often flexuous, whitish, 
sometimes streaked with brown, often tinged with red 
within; spores pale ochraceous-brown, .0004 to .0005 in. 
long, .0002 to .00025 broad. 
Pileus 2 to 4 in. broad; stem 3 to 5 in. long, 4 to 8 lines 
thick. ) 
Woods. New England, Frost. New York, Peck. 
The species is readily recognized by its dull pale color, 
rather long stem and tubes changing to blue where wounded. 
SUBTOMENTOSI 
Pileus when young villose or subtomentose, rarely becom- 
ing glabrous with age, destitute of a viscid pellicle. Tubes 
of one color, adnate. Stem at first extended, neither bulbous 
nor reticulated with veins, rugose or striated in some species. 
Flesh in some changing color where wounded. 
The tubes are generally yellow or greenish-yellow. In 
some species they are occasionally somewhat depressed 
around the stem but they do not form a rounded free 
stratum, nor, with the exception of B. rubeus, are they 
stuffed when young as in most of the Edules. The species 
are scarcely separable from those of the preceding tribe 
except by the more evidently tomentose young pileus. 
