Butyriboletus peckii (Frost) Kuan Zhao & Zhu L. Yang 2015

Ceriomyces peckii (Frost) Murrill, Mycologia 1 : 151. 1909
Boletus Pec Hi Frost ; Peck, Ann. Rep. N. Y. State Mus. 29: 45. 1878.
Boletus roseotinclus Peck, Bull. Torrey Club 27 : 612. 1900. (Type from North Carolina. )
Pileus rather thick, firm, convex or nearly plane, 4-7 cm. broad; surface dry, subglabrous to pruinose or slightly velvety, paleor deep-red, usually fading to pale-tan or buffbrown with age or on drying; margin incurved, entire, concolorous: context firm, white or yellowish, bluish when bruised, taste unpleasant; tubes short, adnate or slightly decurrent, nearly plane in mass, yellow, changing to blue when wounded, mouths minute, circular, edges uneven: spores oblong, smooth, pale ochraceous-brown, 10-12 X 4-5 ;«: stipe equal or subventricose, usually yellow above, red or purplish-red below or the entire length, reticulate, especially above, solid, 4-7 cm, long, 0.5-1.2 cm. thick.
Type locality : Sandlake, New York.
Habitat : Rather open deciduous woods.
Distribution : New England to North Carolina and west to Indiana.

Butyriboletus peckii is a fungus of the genus Butyriboletus native to eastern North America. It was first described by Charles Christopher Frost in 1878. Until 2014, it was known as Boletus peckii. Recent changes in the phylogenetic framework of the Boletaceae prompted the transfer of this species, along with several other related boletes, including Caloboletus calopus, to the genus Caloboletus. In 2015, Kuan Zhao and colleagues published analysis that demonstrated that the bolete belongs to Butyriboletus, closely related to Butyriboletus pulchriceps.