Russula gracillima J. Schaeff. Zierlicher Täubling, Russule gracile, Slender Brittlegill.
Cap 2–6cm across, convex, then flattening, sometimes with an umbo, typically with dull greenish or olive centre and pink margin, but also completely these colours, or pale dull violet, thin-fleshed, fragile, one-third to a half peeling; margin eventually furrowed. Stem 35–70 x 5–10mm, white to greyish rose, soft, fragile. Flesh white. Taste slightly to moderately hot. Gills slightly decurrent, pale cream, thin. Spore print pale cream to cream (C–D). Spores ellipsoid-ovoid with warts up to 1µ high, with very few or no fine lines, 7–9 x 5-7µ. Cap cystidia cylindrical to slightly club-shaped, up to 10µ wide, with 0–1 septa. Habitat under birch. Season summer to late autumn. Uncommon. Edibility unknown – avoid. Found In Europe.