Hohenbuehelia mastrucata

A species typical of riparian trees, especially poplars or cottonwoods.

Pileipellis composed of a layer of filamentous hyphae widely separated by gelification, 3-5 µm wide, septate with clamp connections at the septa.

Cheilocystidia numerous, fusiform to lageniform, terminating in a rounded head (capitate), up to 45 µm long and 6-8 µm wide.

Pleurocystidia fusiform to lanceolate, very thick-walled (metuloids), reaching up to 100 µm long and 16-21 µm wide, with crystalline incrustations at the apex.

Basidia cylindric-clavate, 25-35 µm long and 6-8 µm wide, with basal clamps, 4-spored.

Spores ellipsoidal to slightly amygdaliform, smooth, hyaline, thin-walled, with a prominent lateral apiculus at one end, faint granular internal content, inamyloid in Melzer's reagent.