Brunnipila fuscescens

Formerly known as Lachnum fuscescens, fruiting on leaves of broadleaf trees such as beech or oak, with stipitate apothecia barely up to 1 mm in diameter, with coarse brown marginal hairs usually capped by amorphous crystallizations at the apex.

Outer hairs 70-160 µm long and 3-4.5 µm wide, with abundant dark brown intracellular pigment, septate, the entire surface covered with fine granules or warts, often with an amorphous crystalline cap up to 7 µm wide at the apex.

Medullary excipulum of textura intricata with hyaline hyphae 2-3 µm wide; ectal excipulum hyphae rectangular, hyaline, thick-walled, up to 15 µm long.

Asci cylindrical to clavate, 8-spored, inoperculate, with biseriate to irregular spore arrangement, 35-55 µm long and 4-5 µm wide, with croziers at their base and an amyloid apical apparatus.

Paraphyses lanceolate, 3-5 µm wide, projecting 3-10 µm above the asci.

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