Identifying Your Bolete
7.6
BITTER BOLETE
Tylopilus felleus
Frequency
Frequent
Habitat Area
Under conifers and mixed woods, sometimes on decaying stumps.
Cap
Brown at first, yellow-brown in age.
Margin
Even, often appendiculate.
Tubes
Adnate or free, long and bulging in age.
Pores and Pore Surface
Pore surface whitish when young, pinkish at maturity, staining brown when bruised. Circular pores, 1-2 per mm.
Stalk
Equal to enlarged downward.
Stalk Feature
Stipe adorned with brown reticulations on a cream or brownish background, at least in its upper part, but often over its entire length.
Flesh
White, immutable, rarely staining pale brown when cut.
Basal Mycelium
White.
Chemical reactions
FLESH: few reactions, except with the phenol which blackens the flesh after 25 minutes.
CAP-STIPE: towards yellow with KOH, NaOH and NH4OH on the stipe; to black with phenol; little change with FeSO4 and formalin.
TUBES: to orange then black for KOH and NaOH; towards blackish gray for FeSO4, NH4OH and phenol; towards orange for formalin.
Comments
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In the field, young Bitter Bolete are often confused with King Bolete by beginners; but what a disappointment at the moment of eating. The flesh is so bitter that this bolete is little parasitized by insects.
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