Russula betularum Hora. Birken Speitäubling, Birch Brittlegill
Cap 2–5cm across, flattened convex, often with a central depression, deep rose or pink, but often paler and pale dull golden yellow to yellowish buff at the centre or even entirely so, sticky when moist, thin-fleshed, fragile, completely peeling; margin becoming furrowed and with small, low warts. Stem 25–65 x 5–10mm, cylindrical or narrow club-shaped, longer than the cap diameter, white, fragile. Flesh white, taste hot. Gills almost free, white, rather well-spaced; margin sometimes with small nicks. Spore print whitish (A). Spores ovoid with warts 0.5–0.7µ high, joined by fine lines to form a well-developed but incomplete network, 8–10 x 7.5–8µ. Cap cystidia cylindrical to strongly club-shaped, with 0–2 septa. Habitat under birch, often in damp places. Season summer to early autumn. Frequent. Poisonous. Found In Europe.