° Found west of the Rocky Mountains, excluding Texas. (1/2)
~ Stem yellow to pale yellow under the reticulation; immature pore surface bright yellow; spore print olive brown. (1/3)
Boletus haematinus
At MykoWeb
~ Stem yellow under the reticulation, with a red base or apex; immature pore surface dark red; spore print olive brown. (2/3)
Boletus luridus
~ Stem dull red to reddish brown under the reticulation; immature pore surface dark red; spore print brown. (3/3)
Boletus pulcherrimus
At MykoWeb
° Found east of the Rocky Mountains, or in Texas. (2/2)
~ Merely finely reticulate, near the apex of the stem. (1/2)
Cap color bright red to brick red to "dull rusty rose"; exposed flesh blueing slowly, only at apex of stem, and turning wine brown in the base; known range Michigan to New England; under hardwoods; flesh not changing with FeSO4. (1/5)
Boletus bicolor var. borealis
Cap color some shade of red, fading to reddish brown or dull brown; exposed flesh blueing strongly; known range Florida to Texas; under oak or in oak-pine woods; cap surface staining olive with ammonia. (2/5)
Boletus fairchildianus
Cap color dark red to brick red or brownish red; exposed flesh blueing; known range eastern Canada to Georgia and Texas; under conifers; macrochemical reactions not known. (3/5)
Boletus flammans
at Roger's Mushrooms
Cap color variable, yellowish to olive brown, sometimes with reddish shades; exposed flesh quickly blueing (and with a red line above the tubes in fresh specimens); known range eastern Canada to South Carolina, west to the Great Lakes, and the southwest; under hardwoods or conifers; cap surface dark red to blackish with KOH, flesh orange yellow with KOH. (4/5)
Boletus luridus
Cap color red to brick red, fading; exposed flesh blueing; known range eastern Canada to North Carolina to Michigan; under hardwoods, especially oaks; cap surface not changing with ammonia, flesh pale amber with ammonia. (5/5)
Boletus miniato-pallescens
at Roger's Mushrooms
~ Reticulation, more prominent, covering at least the upper third of the stem. (2/2)
Taste and smell not distinctive; cap color dark red to brick red to brownish red; exposed flesh blueing; known range eastern Canada to Georgia to Texas; under conifers; macrochemical reactions not known. (1/6)
Boletus flammans
at Roger's Mushrooms
Taste and smell not distinctive; cap color pinkish red to brownish red; exposed flesh blueing quickly; known range Tennessee to Florida to Texas; under oaks; macrochemical reactions not known. (2/6)
Boletus floridanus
Taste and smell not distinctive; cap color variable, yellowish to olive brown, sometimes with reddish shades; exposed flesh blueing quickly; known range eastern Canada to Great Lakes to South Carolina; under hardwoods or conifers; cap surface dark red to blackish with KOH, flesh orange yellow with KOH. (3/6)
Boletus luridus
Taste not distinctive, smell "faintly chlorine-like on mature specimens"; cap color brownish olive to yellowish olive; exposed flesh blueing quickly, then turning slowly olive-fuscous; known range New York to Great Lakes; under hardwoods; cap surface dark red reddish brown with KOH and flashing slate blue, vinaceous orange or greenish olive with ammonia, flesh orange with KOH and blue to yellow with ammonia. (4/6)
Boletus pseudo-olivaceus
Taste "sweet to nauseous sweet," smell "of overripe fruit"; cap color pinkish to brick red, developing olive to brown shades; exposed flesh blueing instantly; known range western New York to Ohio; under red oak; cap surface flashing bluish slate with ammonia and bright orange with KOH, flesh orange with ammonia and with KOH. (5/6)
Boletus rhodosanguineus
at CMM
Taste and smell not distinctive; cap color dark red; exposed flesh blueing quickly; known range New England to Michigan to Tennessee; under hardwoods; macrochemical reactions not known; stem without yellow shades, or only yellow at apex. (6/6)
Boletus rubroflammeus
