BOI.ETUS. 121 



Tubes, large, subdecurrent, angular, yellow, with a reddish 

 tint. 



Stem, one to two inches high, thin, more or less yellow. 



Spores, oval, brown, .0003 to .00015 inch. 



Found in an open woods of scrub oak, near Koch's abandoned orebed. 



B. dichrous. Ellis. The Two-colored Boletus. 



Pileus, convex, viscose, dull red, flesh soft, dull yellowish- 

 white, changing to greenish blue when wounded, finally yellow. 



Tubes, subdepressed around the stem, large, unequal, 

 vStraw- colored, changing color like the flesh when bruised. 



Stem, thickened below, solid, covered with a red squamu- 

 lose coat, except .at the 3'ellow apex, yellow within. 



Spores, elliptical, .0007 inch long. 



Found specimens in Kuhn's woods. Prof. Peck determined it as the 

 above-mentioned species. 



Group II. Subpruinosi. 



Pileus glabrous, but more often pruinose, tubes adnate 

 yellowish, stem equal, even, neither bulbous nor reticulated. 



B. miniato-olivaceus. Frost. Olive-red Boletus. 



Pileus, at first pruinose-tomentose, red, becoming glabrous 

 and ochraceous red with age ; flesh yellow, but instantly 

 tundng to a livid indigo blue, convex plane. 



Tubes, bright yellow, adnate, or subdecurrent. Sensitive 

 to change to blue. 



Stem, glabrous, enlarged at the base, pale yellow, brighter 

 yellow within, sometimes lurid at the base. 



Spores, .0005 inch long, .00025 broad, 



