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, pilous 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. Veiy 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. fidvidus, to which our plant has 

 commonly been referred by American m3'cologists, 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. \\\ B . jiavidus tha stem. \s described as sprinkled with fuga- 

 cious glandules alcove the merely viscous annul us. In B. Amencanus 

 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 subaureiis Pk. 



Pale-golden Boletus. 



Pileus convex, becoming nearly plane, soft, viscose, pale-yellow or 

 golden-yeUoiv, sometimes adorned with darker spots or small tufts of 

 hairs, the margin in the young i)lant slightly grayish-tomentose, 

 flesh i)ale-3'ellow ; tubes small or medium size, somewhat augular, 

 adnate or sub^ecurrent, pale-yellow, becoming dingy-ochraceous ; 

 stem equal, fitout, glandular-dotted, yellow tvithout andicilhhi ; spores 

 ochmceons-broivn, oblong or subfusiform, .00035 to .0004 in. long, 

 .00016 broad. 



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

 J..5 to 2.5 in. long, 4 to 6 lines thick. 



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