Pileus fleshy, firm, centrally depressed, scabrous-hairy, sometimes rimose-areolate, dark-green, flesh whitish, milk white, taste acrid; lamellae rather close, adnate or decurrent, whitish, sometimes spotted, or green on the edge; stem equal, short, hollow, colored like, but often paler than the pileus, spotted; spores yellowish-white, subglobose, rough, .0003 in. in diameter.
Holotypus: Peck (NYS)
Published type studies: Hesler & Smith (1979), N. Amer. Spec. Lactarius: 222
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