N. Vietnam, Ha Giang prov., Dong Van distr., Tu Tinh municipality (N. 23°05' E 105°15'), 40.7 km to 43° of Ha Giang city. Remnants of dry. broadleaved evergreen forest on steep slopes and cliffs near the top. of karst limestone isolated mesae at elev. 600-750 m a.s.l. Lithophyte. on open mossy rocks. Leaves below deep violet. Common. No NTH 3511 10 Oct. 1999. Collectors: N.T. Hiep, N.Q. Binh, L. Averyanov, P. Cribb.
Coordinates (geographic position):23° 5′ 0″ N, 105° 15′ 0″ E ±1000 mRecord creation: 2019-06-21, Leonid Averyanov, PhotoScan D1. Processing status: work_status_1Citation: Specimen LE 01055700 // Virtual herbarium of Komarov Botanical Institute RAS — http://re.herbariumle.ru/01055700