Herba terrestris infirma ca. 7—13 cm alta, iolio profunde cordato margine subtilissime crenulato, bracteis late ovatis acutis ovario sub-aequilongis, sepalo dorsali attenuatim lineari, sepalis lateralibus petalisque filiformibus, labello latissime rhombico glabro, in fauce callo compresso-linguiformi acuto praedito, ad columnam appendice ventrali acuto-mucronato aliformi. Distinctus ab omnibus speciebus notis Acianthi callo compresso-linguiformi et columna alata. Typus: R. Schodde and L. Craven 3889, South rim of Lake Loloru crater, Bougainville Island, 23-8-1964; holotypus: CANB.