Cap: 0,8-4 cm across, first hemispherical, later convex to expanded or little depressed, not umbonate, viscid to nearly dry, hygrophanous, dark do dark brick or dark brown, also nearly black, toward margin same colored or through cinnamon and clay buff to dark pinkish buff.
Hymenophore: lamellae are pale grayish, later clay buff, adnate to emarginate, crowded, broad, edge is under lens paler, fimbriate, without droplets.
Spore print: brown
Spore: amygdaliform to ovoid, 8,9-13,5 x 5,4-7,9 μm
Stem: 1,2-6 x 0,1-0,6 cm, cylindric, often subclavate, sparsely floccose above the cortina zone, in entire length fibrillose, sordid whitish to clay buff, later discoloring to dark brown from the base.
Flesh: in stem hollow, in cup dark, fading to cinnamon, in stem whitish, turning clay buff to dark from the base, odor is if cut radish like, taste is radish like or bitter.
Habitat: in bogs, sand dunes in arctic and alpine habitats, under willow, grows from summer to fall.