A small species with a dark rased center easly mistaken for similar species.

Cap: Up to 25 mm diam.; hemispherical or conico‑convex, usually with a small umbonate papilla in mature specimens. Colour black, fuscous, or yellow‑brown with an olive tinge at the centre, paler to pale yellow‑brown toward the margin. Surface dry, hygrophanous, indistinctly striate near the margin, coarsely fibrillose; no conspicuous veil remnants.
Lamellae: 12-20, with ~3 tiers; adnexed to broadly adnate, up to 3 mm wide. Colour bright mustard yellow to orange‑brown, becoming ferruginous in old material. Edges concolorous or paler, distinctly fimbriate due to cheilocystidia.
Stipe: Up to 25 x 3 mm, cylindrical, sometimes attenuated at base; single or cespitose. Colour yellow, with inconspicuous cortina and fragmentary yellow to pale rust‑brown veil zones below. Surface dry, fibrillose; hollow.
Context: Yellow‑brown‑olive in pileus; brown‑black in stipe base.
Odour/taste: Distinctly raphanoid.