BOLETI OF THE UNITED STATES 135 
habitant of Costa Rica, differs in its whitish, subbulbous or 
obclavate stem and its entirely free tubes. 
Boletus leprosus wv. sp. 
Leprous BOLETUS 
Pileus very convex, glabrous, soft like kid, cinereous yel- 
lowish-drab or pale-brown, slowly changing to whitish where 
. bruised, the cuticle separable, flesh whzte, changing to yellow- 
ash; tubes yellow or brownish-yellow, changing to greentsh 
where wounded, plane, depressed around the stem, short, 
small, stuffed when young; stem solid, enlarged at the top, 
lemon-yellow , spores oblong-fusiform, .0005 to .0006 in. 
long, .o002 broad. 
Pileus 4 to 6 in. broad; stem 2 in. long, 1 in. thick. 
Mixed woods. North Carolina, C. /. Curtzs. 
This plant is remarkable for the whitish or leprous spots 
which the pileus assumes, even from being handled, and for 
the change in the color of the flesh and tubes. The stem 
is very thick at the top but tapers downward. 
Boletus affinis Px. 
RELATED BOLETUS 
Rep. 25, p. 81 
Pileus convex or nearly plane, dry, glabrous or minutely 
tomentose, even or slightly rugose, brown or chestnut color, 
fading to tawny or ochraceous with age, sometimes rimose- 
areolate or spotted, flesh white, occasionally slowly chang- 
ing to yellowish where wounded; tubes plane or convex, 
adnate or slightly depressed around the stem, at first white 
and stuffed, then glaucous-yellow or subochraceous, becom- 
ing ferrugtnous-ochraceous where wounded , stem subequal, 
sometimes narrowed either above or below, even or rarely 
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