Helvella lacunosa

Cap with 2 or 3 lobes and a deeply fluted, chambered, lacunose stipe.

Ectal excipulum with terminal hyphae, cylindrical, erect, septate, moderately thick-walled, with greyish-brown intracellular pigment.

Asci 8-spored, uniseriate, operculate, up to 350 µm long, 13-16 µm wide, inamyloid in Melzer's reagent.

Paraphyses filiform, simple, septate, with brownish intracellular pigment, 3-5 µm wide, with swellings in the terminal cell up to 7 µm, projecting slightly above the asci.

Ascospores ellipsoidal, smooth, hyaline, thin-walled, with a large central oil droplet occupying more than half the spore volume.

Herbarium material available: JTP2215/24.