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Basidiomata
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Pileus 30–70(−90) mm; greyish yellow to brownish (4A3–5 to 4B3–5), dark blond to yellowish brown (5D4–5 to 5E4–5)
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Pileus to 36 mm, very dark brown, almost black
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Pileus 40–65 mm; greyish brown to beige- brown (5CD3 to 6DE3)
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Lamellae and lamellulae
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Broadly adnate, to decurrent, crowded L+l = 4+12 to 3+6/cm
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Broadly adnate, not decurrent, distant (total 28)
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Broadly adnate, to slightly subdecurrent, distant L+l = 4–5/cm
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Context
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Firm, white to cream then orange-red, greyish red, finally black
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Very thin and transparent, turning red then red- orange, finally black
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Firm, first whitish becoming blackish finally black
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Latex
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Water-like, then successively brownish, blood-red, buff, cream
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Hyaline turning grey then dark brown
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Transparent white, becoming pinkish grey (7A2) then blackish
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Reaction of context to FeSO4
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Unchanging
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Weakly greyish green
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Bluing
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Taste
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Mild, then acrid
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Mild, slightly astringent
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Bitterand acrid
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Basidiospores
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Globose to subglobose
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Usually ellipsoid, rarely subglobose
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Globose, subglobose rarely ellipsoid
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Q = 1.01–1.07–1.09–1.15
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Q = 1.07–1.21–1.36–1.55
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Q = 1.04–1.11–1.27
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Plage distally amyloid
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Plage not, or slightly amyloid
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Plage not amyloid
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Cystidia
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Pleurocystidia 40–55 × 9–11 µm scarce to abundant, often arising deep in the hymenium, slightly thick-walled
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Pleurolamprocystidia 50–65 × 7–10 µm abundantfusiform or irregular, thick-walled
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Pleurocystidia 35–56 × 6–9 µm, scarce, inconspicuous subcylindrical, subclavate, thin-walled
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Marginal cells
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21–40 × (2−)3–5 µm, cylindrical, tortuous or fusiform, rounded, mucronate, with tapering apex
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20–35 × 4–7 µm, rarely clavate, mostly fusiform
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23–72 × 3–6 µm, subcylindical, fusiform or tortuous, almostly septate, mostly with tapering apex
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Pileipellis
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Hymeniderm, suprapellis 10–25 × 3–5 µm, thin-walled
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Palisade, suprapellis thick, 25–40 × 3–5 µm, thin-walled
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Palisade, suprapellis thin 20–60 × 3–5 µm, thin-walled
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