Tremella aurantia

A parasitic fungus on Stereum hirsutum, according to Index Fungorum currently named Naematelia aurantia, with gelatinous, lobed or folded fruit bodies, bright yellow, 3 to 10 cm in diameter, with a smooth, shiny hymenium covering the outer layer of folds, without a distinct stipe, attached directly to the wood, lacking a noticeable odor or taste.

Monomitic hyphal system, with context hyphae hyaline, thin- to slightly thick-walled, 1.5 to 3.5 µm wide, profusely branched, widely separated by gelatinization, septate and with clamp connections.

Basidia ovoid to pyriform, hyaline, longitudinally septate (cruciate-septate in front view), 15 to 20 µm long, 10 to 15 µm wide, with basal clamp connections and 4 long, stout sterigmata.

Spores subglobose to amygdaliform (tear-shaped), smooth, hyaline, thin-walled, with a slightly eccentric apiculus at one end, 7 to 9 µm long, 5.5 to 7.5 µm wide, with granular contents inside, inamyloid in Melzer's reagent.

Herbarium material available: JTP2437/25.