Part 3, 1910] BOLETACEAE 155 
1. Boletus luteus L. Sp. Pl. 1177. 1753. 
Boletus annulatus Pers. Syn. Fung. 503. 1801. 
Boletus salmonicolor Frost, Bull. Buffalo Soc. Nat. Sci. 2: 100. 1874. (Type from Vermont.) 
Cricunopus luteus P. Karst. Rev. Myc. 39: 16. 1881. 
Viscipeilis luteus Quél. Ench. Fung. 155. 1886. 
Boletus subluieus Peck, Bull. N. Y. State Mus. 12: 62. 1887. (Type from New Vork.) 
Ixocomus luteus Quél. FL Myc. Fr. 414. 1888. 
Boletus acidus Peck, Bull. N. Y. State Mus. 105: 15. 1906. (Type from New York.) 
Pileus convex, solitary, 5-10 cm. broad; surface smooth, glabrous, very viscid, yellow- 
ish-brown, grayish-brown or reddish-brown, sometimes streaked, becoming darker and 
duller with age; margin thin, entire or undulate: context compact, pale-yellowish, darker 
with age, unchanging when wounded, edible; tubes 1.5-2.5 mm. long, plane or convex in 
mass, adnate or slightly decurrent, somewhat depressed, dark-melleous, unchanging when 
wounded, darker with age, mouths 1 mm. in diameter, nearly circular, edges adorned with 
reddish-brown dots: spores oblong-fusiform, smooth, yellowish-brown, 6-9 K 2.54: stipe 
slightly tapering downward, pale-yellow to reddish-brown, glandular-dotted both above 
and below the annulus, solid, yellowish and unchanging within, about 3-6 cm. long, 1-2 
em. thick; annulus large, membranous, white to slightly brownish, glandular-dotted, 
persistent, 
TYPE LOCALITY: Sweden. 
Hazitat: Sandy soil in coniferous or mixed woods. 
DISTRIBUTION : Eastern United States ; also in Europe. 
ILLUSTRATIONS: Gill. Champ. Fr. /. 66; Bull. N. Y. State Mus. 105: £2. T, f. 1-6; Ann. Rep. 
N. Y. State Mus. 48: 7.33, f. I-12; Barla, Champ. Nice pl. 31; f. 1-3; Sturm, Deuts. Fl. Pilze 
54: pl. 1; Krombh. Abbild. Be. 33; ‘Atk, Stud, Am. Fungi f. 168, 169. 
EXSICCATI: Shear, N. Y. Fungi 28 ; Herpell, Prap. Hutpilze 34, il4 ; Ellis & Ev. N. Am. Fungi 
1930; Sydow, Myc. Mar. 1411, 
2. Boletus amabilis Peck, Bull. Torrey Club 27: 612. 1900. 
Pileus circular, convex, 5-18 cm. in diameter; surface glabrous, reddish-tawny, with 
small brown or blackish-brown spots in dried specimens, probably viscid when fresh ; mar- 
gin even, sterile, concolorous: context pallid; tubes radiating, decurrent to the annulus, 
short, yellow, mouths angular, radially elongate, edges thin, entire: stipe equal or slightly 
tapering downward, paler than the pileus, reticulate above the small whitish annulus, solid, 
2.5-5 cm. long, 8-16 mm. thick. 
TYPE LOCALITY: Colorado. 
HABITAT: Dense spruce woods. 
DISTRIBUTION: Colorado. 
3. Boletus sphaerosporus Peck, Bull. Torrey Club 12: 33. 1885. 
Pileus circular, convex, 7-15 cm. broad; surface smooth, glabrous, viscid, cream-col- 
ored when young, becoming reddish-brown with age; margin thin, even, regular, sterile, 
often inflexed when dry, ornamented with portions of the veil: context pale-yellowish, 
becoming brownish with age: tubes adnate or somewhat decurrent, pale-yellow or yellow- 
ish-buff, becoming olive-brown or brown with age, tinged with green at times, mouths 
large, angular, uneven, shallow near the margin, edges thin, some of them elongated into 
coarse teeth: spores globose or broadly ellipsoid, 7.5-9 long: stipe thick, equal, 3-7 cm. 
long, 1.5-3 em. thick, reticulate at the apex'only, or for half the distance downward, 
bearing near the base a very conspicuous white, membranous, sheathing, persistent annulus. 
TYPE LOCALITY: Madison, Wisconsin. 
Hasitat: Low ravines and sandy places in woods, occasionally about stumps. 
DISTRIBUTION: Wisconsin, Iowa, and Minnesota. 
4. Boletus Clintonianus Peck, Ann. Rep. N. Y. State 
Cab. 23: 128. 1872. 
Boletus viridarius Frost, Bull. Buffalo Soc. Nat. Sci. 2: 100. 1874. (Type from Vermont.) 
Boletus serotinus Frost, "Bull. Buffalo Soc. Nat. Sci. 2: 100. 1874. (‘Type from Vermont.) 
Pileus convex, gregarious, 5~12 cm. broad; surface golden-yellow to chestnut, becom- 
ing darker with age, smooth, viscid, glabrous, with separable cuticle; margin at first in- 
