BOLETI OF THE UNITED STATES 109 
the base, pallid above, with a xarrow reddish circumscribing 
zone or line at the top; spores oblong, brownish-ochraceous, 
tinged with green when fresh, .o004 to .0005 in. long, .o0016 
broad. 
Pileus 3 to 5 im. broad: stem 1 to 3 in. long, 5 to 10 
lines thick. 
Grassy ground under oaks. New York, Peck. 
The species is well marked by the reddish band or line 
on the stem just below the tubes, but this disappears in 
drying. 
Boletus alutaceus Morean Ms. 
LEATHER-COLORED BOLETUS 
Pileus pulvinate, glabrous, a/utaceous with a tinge of red, 
flesh whzte znclening to reddish, tubes semifree, medium in 
size, unequal, angular, greenish-yellow ; stem nearly equal, 
striate, reticulate at the apex, colored like the pileus; spores 
fusiform, brownish-olive, .o005 in. long, .oo02 broad. 
Pilews 3 int broad. 
Rocky woods of oak and chestnut. Kentucky, Morgan. 
The general aspect of the figure of this species recalls 
some of the forms of Boletus subtomentosus. The tubes are 
nearly equal in length to the thickness of the flesh of the 
pileus. 
Boletus tenuiculus Frost 
Tuin BOLETUS 
Bull. Buff. Soc. 1874, p. 103 
Pileus nearly plane, ¢4zz, lurid-red on a yellow ground, 
flesh unchangeable; tubes short, adnate, small, golden- 
yellow, stem slender, equal, colored like the pileus; spores 
.0004 in. long, .00025 broad. 
Pileus 1 to 2 in. broad; stem 4 to 6 in. long. 
