NATURAL HISTORY SURVEY 105 



Tubes subadnate, more or less depressed around the stem, 

 white or whitish, becoming brown. 



Stem equal or slightly tapering upward, scabrous-punctate, 

 whitish or pallid, chrome-yellow at the base without and within, 

 sometimes reddish above. 



Spores oblong, 11 to 14 x 4 to 5 /*.; pileus 5 to 10 cm. broad; 

 stem 5 to 10 cm. long, 8 to 12 mm. thick. 



Mossy base of Pinus divaricata, Clarke, Indiana. August. 

 Boletus castaneus Bull. 



Pileus convex, nearly plane or depressed, firm, even, dry, 

 minutely velvety-tomentose, cinnamon or reddish-brown; flesh 

 white, unchangeable. 



Tubes free, short, small, white becoming yellow. 



Stem equal or tapering upward, even, stuffed or hollow, 

 clothed and colored like the pileus. 



Spores 10 to 12 x 6 to 7.5 /*.; pileus 4 to 7.5 cm. broad; stem 

 2.5 to 6 cm. long, 6 to 12 mm. thick. 



Woods, Millers. August. The pileus in young plants is pale 

 cervine, becoming darker with age. Spores cream-color, 9 to 11 

 x 5 to 6 /x. 



STROBILOMYCES. 



Stratum of tubes not easily separable from the pileus; tubes 

 as in Boletus. Outer surface of the pileus tough, and torn into 

 scales. 



Strobilomyces strobilaceus Berk. 



Pileus hemispherical or convex, dry, covered with thick 

 floccose projecting blackish or blackish-brown scales, the margin 

 somewhat appendiculate with scales and fragments of the veil; 

 flesh whitish changing to reddish and then to blackish where 

 wounded. 



Tubes adnate, whitish, becoming brown or blackish with age, 

 their mouths large, angular, changing color like the flesh. 



Stem equal or tapering upwards, sulcate at the top, floccose- 

 tomentose, colored like the pileus. 



Spores subglobose, rough, blackish-brown, 10 to 12.5 p. ; 

 pileus 5 to 10 cm. broad; stem 7.5 to 12.5 cm. long, 8 to 20 mm. 

 thick. 



Grassy places in woods. July and August. Frequent. 

 Pileus occasionally up to 15 cm. in diameter. The ground-color 1 

 of the pileus is white or smoky-white when the plant grows in 

 shaded places out of the reach of sunlight. The stem is often 

 curved or crooked. 



FISTULINA. 



Stem strictly lateral; pores in the form of tubes whose mouths 

 are separated from each other. 



