Hydnocystis bombycina

A hypogeous fungus with smooth spores and a strong odor of rotten onions.

Peridium outer hyphae thick-walled (over 1 µm), surface verrucose, 4-6 µm in diameter, with abundant brown intracellular pigment.

Beneath this hyphal layer lie hyaline, thick-walled, globose to cylindrical hyphae up to 30 µm in diameter.

Asci cylindrical, up to 230 µm long and just over 30 µm wide, mostly 4- to 8-spored, with a long pedicel, inamyloid in Melzer's reagent.

Ascospores perfectly spherical, smooth, hyaline, with only faint yellowish granular internal content.

Herbarium material available: JTP2188/24.