Sclerotinia tuberosa (Fr.) Fuckel. Anemonen-Becherling. Cup 1–3cm across, initially deeply cup-shaped then expanding, inner surface tan to chestnut-brown, outer smooth and similarly coloured or paler. Stem up to 10cm long, smooth and brown. Asci 170 x 10µ. Spores smooth and elliptic, with one small oil drop at either end, 12–17 x 6–9µ. Habitat arising from large black sclerotia on old tubers of Anemone or occasionally Ranunculus. Season early spring. Rare but probably often overlooked. Not edible. Distribution, America and Europe.