Vietnam, Lang Son Prov., Bac Son Distr., Tan Tri Municipality, around Na Mau village.
Highly degraded primary and secondary broad-leaved evergreen forest on very steep slopes and along tops of ridge composed with solid highly eroded crystalline gray marble-like limestone at elevation about 500-600 m a.s.l.
Creeping lithophyte on open mossy rocks. Sepals green-brown, petals white. lip with greenish central spot. Leaves dull green-silver-brownish. Locally very common.
HAL 6709a 14 March 2005. Collectors: L.Averyanov, N.T.Hiep, P.V.The, A.Averyanova.
Record creation: 2019-10-25, Leonid Averyanov, PhotoScan D1. Processing status: work_status_1Citation: Specimen LE 01059133 // Virtual herbarium of Komarov Botanical Institute RAS — http://re.herbariumle.ru/01059133