Ciboria batschiana

Ciboria batschiana (Zopf) N.F. Buchw. (illustrated 80% life size) Cup 0.5–1.5cm across, concave at first then flattened, attached by a slender, dark brown stalk up to 2cm long; inner surface cinnamon, outer similarly coloured, finely downy. Spores 6–11×4–6¼, ellipsoid. Asci 150×8¼. Habitat on old acorns; autumn. Occasional. Not edible.