Lachnum impudicum

A species fruiting on broadleaf wood such as beech or oak, with a diameter of only 0.3-0.8 mm, and a cream-colored cup with a whitish margin.

Marginal hairs cylindrical, hyaline, 40-60 µm long and 3-4 µm wide, septate, the entire surface covered with minute incrustations giving a verrucose appearance.

Medullary excipulum of textura intricata; ectal excipulum hyphae of textura prismatica, hyaline and thick-walled.

Asci cylindrical, 8-spored, with biseriate to irregular spore arrangement in the upper ascus, 45-55 µm long and 4-5 µm wide, with croziers, with an amyloid apical apparatus in Melzer's reagent.

Paraphyses lanceolate, septate, 3-5 µm wide, projecting 5-15 µm above the asci.

Ascospores cylindrical to slightly fusiform, smooth, hyaline, thin-walled, with homogeneous content devoid of guttules or granulations inside.