SPECIES OF VISCID BOLETI. 63 
reddish-brown glandular dots, yellow within; spores ochraceo-fer- 
ruginous, oblong or subfusiform, .00035 to .00045 in. long, .00016 
to .0002 broad. 
Gregarious, pileus 1 to 3 in. broad, stem 1.5 to 2.5 in. long, 2 to 4 
lines thick. 
Under or near pine trees in woods and open places. Very com- 
mon. July to October. 
This is one of our most common species. It is generally associated 
with B. granulatus, from which it is easily distinguished by its thinner 
pileus, yellow color and more slender stem. As in that and other 
related species, the stem and tubes exude drops of a turbid milk or 
juice which hardens and forms the glandular dots seen on them. 
These are sometimes so numerous that they become confluent. By 
them and the viscidity of the pileus in this and allied species the 
fingers become stained in handling the fresh plants. The species is 
closely related to the European B. flavidus, to which our plant has 
commonly been referred by American mycologists, and under which 
name it stands in the Twenty-third Report. I am satisfied by more 
recent investigation that it should be kept distinct, inasmuch as it 
constantly differs in the character of the veil and the dots of the 
stem. In B. flavidus the stem is described as sprinkled with fuga- 
cious glandules above the merely viscous annulus. In 5. Americanus 
the stem is dotted from top to base with persistent glandules, there 
is no appearance of an annulus on it and the veil is somewhat to- 
mentose on the margin of the young pileus. The plant has a slight 
subacid odor which is perceptible even in the dried specimens. The 
mycelium is white. 
Boletus subaureus Pk. 
. 
Pale-golden Boletus. 
Pileus convex, becoming nearly plane, soft, viscose, pale-yellow or 
golden-yellow, sometimes adorned with darker spot& or small tufts of 
hairs, the margin in the young plant slightly grayish-tomentose, 
flesh pale-yellow ; tubes small or medium size, somewhat angular, 
adnate or subdecurrent, pale-yellow, becoming dingy-ochraceous ; 
stem equal, stout, glandular-dotted, yellow without and within ; spores 
ochraceous-brown, oblong or subfusiform, .00035 to .0004 in. long, 
-00016 broad. 
Plant gregarious or rarely cxespitose, pileus 2 to 4 in. broad, stem 
1.5 to 2.5 in. long, 4 to 6 lines thick. 
