Hydnophlebia Parmasto, Izv. Akad. Nauk Estonsk. SSR, Ser. Biol. 16: 384. 1967

Type species.

Hydnum chrysorhizon Torr. in Eaton, Manual Bot.: 309. 1822

Basidioma resupinate, separable, generally reddish orange yellow. Hymenophore hydnoid, with aculei up to 0.5-1.5 mm long, conical to cylindrical. Margin with strands. Hyphal system monomitic with scattered clamps, subicular and strand hyphae thick-walled, colorless to yellowish, encrusted, aculei and subhymenial hyphae thin-walled, also colorless. Cystidia cylindrical to ventricose, colorless, thin-walled, sometimes few. Basidia cylindrical to subclavate, with 4 sterigmata, basal clamp absent. Spores cylindrical, ellipsoid to subglobose, smooth, thin-walled.

Key to species of Hydnophlebia