138 NORTH AMERICAN FLORA [VoLUME 9 
TYPE LOCALITY : New England. 
HaBitTatT: Open deciduous woods. . : 
DISTRIBUTION : New England to Mississippi and west to Wisconsin. 
ILLUSTRATION: MclIlv. Am. Fungi p/. 118, f. 2. 
2. Ceriomyces Betula (Schw.) Murrill, Mycologia 1: 144. 1909. 
Boletus Betula Schw. Schr. Nat. Ges. Leipzig 1: 90. 1822. 
Boletus Morgant Peck, Bull. Torrey Club 10: 73. 1883. (Type from Kentucky.) 
Pileus hemispheric, 3-9 em. broad, 1-2 cm. thick; surface smooth, viscid, shining, 
perfectly glabrous, latericeous to almost luteous; margin acute, paler: context whitish, 
tinged with red or yellow, becoming reddish when bruised, slightly acid, not bitter ; tubes 
nearly free, depressed at times, flavous, becoming darker at maturity, changing to greenish- 
yellow when wounded, mouths large, subcircular, somewhat unequal: spores melleous to 
olive-brown, papillate, oblong-ellipsoid, 16-20 X 7-9: stipe tapering upward at the base, 
very long, pitted with long narrow depressions, giving it a shaggy appearance, flavous above 
and along the ridges, dull-purplish below, especially in the depressions, flesh solid, white 
or yellow with purplish tints, 10-20 cm. long, 0.5-1.5 cm. thick. 
TYPE LOCALITY: North Carolina. 
HABITAT: Rocky deciduous woods. 
DISTRIBUTION : North Carolina to Alabama and west to Tennessee, Ohio, and Kentucky. 
ILLUSTRATION: Bull. Torrey Club 10: £1. 35. 
3. Ceriomyces albellus (Peck) Murrill, Mycologia 1: 145. 1909. 
Boletus albelius Peck, Ann. Rep. N. Y. State Mus. 41: 77. 1888. 
Pileus circular, convex, subcespitose, 2-4 cm. broad; surface white or grayish-white 
with more or less bloom, sometimes pale avellaneous-isabelline, occasionally violet-gray 
when young, glabrous or subglabrous, dry; margin thin, regular, fertile, concolorous: 
context white or whitish, tinged with yellow at times, unchangeable; tubes plane, adnate, 
slightly depressed at times, rather short, white, violet-gray at times when young, becom- 
ing pale-yellow and sometimes darker-yellow from the maturing of the spores, mouths 
small, nearly circular, regular, edges rather thick, entire: spores oblong-ellipsoid, brown- 
ish-ochraceous, 14-16 & 5-64: stipe central, cylindric, equal, sometimes thickened at the 
base, white or whitish, glabrous or nearly so, usually distinctly reticulate in the upper half, 
but rarely smooth or somewhat striate except at the very top, 3-5 cm. long, 5-10 mm. thick. 
TYPE LOCALITY: Sandlake, New York. 
HABITAT: Deciduous woods. 
DISTRIBUTION : New York to Virginia and Tennessee. 
4. Ceriomyces frustulosus (Peck) Murrill, Mycologia 1: 145. 1909. 
Boletus frustulosus Peck, Bull. Torrey Club 24: 146. 1897. 
Pileus thick, convex or nearly plane, 2.5-5 cm. broad; surface white or whitish, sub- 
glabrous, rimosely areolate, the areolae unequal and appearing like frustra of polygonal 
pyramids: context whitish, unchanging; tubes depressed, whitish, becoming pale-brown, 
equaling the thickness of the context: spores fusiform, smooth, yellowish-brown, 15-18 x 
4-6: stipe equal, whitish, reticulate above and sometimes nearly or quite to the base, 
solid, 2.5-5 cm. long, 1-2 em. thick. 
TYPE LOCALITY: Ocean Springs, Mississippi. 
HABITAT: Open ground and clay banks. 
DISTRIBUTION: Mississippi and Alabama. 
5. Ceriomyces griseus (Frost) Murrill, Mycologia 1: 145. 1909. 
Boletus griseus Frost; Peck, Ann. Rep. N. Y. State Mus. 29: 45. 1878. 
Botetus flexuosipes Peck, Bull. N. Y. State Mus. 8: 130. 1889. (Type from North Carolina.) 
Pileus broadly convex, 5-10 cm. in diameter ; ‘surface subglabrous, smooth, dry, light- or 
dark-gray, rarely slightly brownish: context firm, whitish or grayish, yellowish in spots 
unchanging ; tubes adnate, slightly depressed, somewhat decurrent at times, pure-white oe 
whitish, becoming brownish with age and darker when bruised: spores ellipsoid, smooth 
ochraceous-brown, 9-14 * 4-5: stipe flexuous, whitish or yellowish, changing oe brown 
