Russula norvegica Reid. formerly misdetermined in Britain as R. alpina. Nordisher Täubling.
Cap 13–27mm across, hemispherical, later more or less flat, purple-black at first, later violet, purple to wine purple, or purplish red, as if powdered at first when sticky when moist, half peeling. Stem 10–27 x 3–8mm, white, cylindrical to club-shaped, becoming furrowed or longitudinally wrinkled. Flesh white. Taste burning hot. Gills rounded, sinuate, white or whitish, fairly closely spaced; margin entire. Spore print pale cream (B). Spores ovoid-ellipsoidal; warts up to 0.7–1.0µ high, mostly connected by fine lines which often form a more or less complete network with many small meshes, 7.5–11 x 5.5–7.5µ. Cap surface with abundant dermatocystidia, strongly reacting with SV, mostly club-shaped, often with one, sometimes more septa. Habitat with dwarf willow above the tree line on Scottish mountains. Season summer to early autumn. Rare. Not edible. Found In Europe.