SPECIES OF VISCID BOLETI. 63 



reddish-brown glandular dots, yellow within ; spores ochraceo-fer- 

 ruginous, oblong or subfnsitbrm, .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. jlavidus, 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. jlavidus the stem is described as sprinkled with fuga- 

 cious glandules above the merely viscous annul us. In B. Ameriaanus 

 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-yelloiv, sometimes adorned with darker spots 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 

 ocliraceous-brown, oblong or subfusiform, .00035 to .0004 in. long, 

 .00016 broad. 



Plant gregarious or rarely ciespitose, pileus 2 to 4 in. broad, stem 

 1.5 to 2.5 in. long, 4 to 6 lines thick. 



