BOLETI OF THE UNITED STATES 143 
This species resembles the preceding one in general ap- 
pearance, but it is very distinct by its much longer spores 
and by the velvety hairiness toward the base of the stem. 
Boletus firmus Frost 
Firm BoLEtus 
Bull. Buff. Soc. 1874, p. 103 
_ Pileus convex, very firm, slightly tomentose, gray, often 
lacunose, flesh yellowzsh or deep-yellow, changing to blue 
where wounded; tubes adnate, deeply arcuate, unequad, yel- 
low, their mouths ¢znged with red; stem solid, har® very 
finely retrculated, yellowish, reddish at the base; spores .0005 
in. long, .coo12 broad. 
Pileus 2.5 to 4 in. broad; stem 2 to 4 in. long. 
Rich moist wood. New England, /vost. 
Apparently a well marked and very distinct species. Ac- 
cording to the author it is readily distinguished by its ten- 
acity and generally distorted growth. I have not seen it nor 
the next. 
Boletus magnisporus Frost 
LARGE-SPORED BOLETUS 
Bull. Buff. Soc. 1874, p. 103 
Pileus convex, firm, tomentose, golden-yellow ; tubes 
scarcely adnate, even, greenish-yellow, their mouths light 
cinnabar-red; stem -long, slender, yellow above, red below; 
spores .0006 to .0007 in. long, .00025 broad. 
Pileus 2.5 to 3.5 in. broad. 
Woods and thickets). New England, Fyvost. Ohio, 
Morgan. 2 
Mr. Morgan remarks that the tomentum of the pileus is 
sometimes brownish-yellow, that the flesh is greenish-yellow 
se) : 
