Vietnam, Quang Binh Prov., Minh Hoa Distr., Thuong Hoa Municipality, about 2 km to E of Ban On village (17º40'21''N, 105º58'00E). Heavily logged primary and secondary closed evergreen broad-leaved forest and scrub on rocky ridge composed with solid and stratified marble-like highly eroded crystalline limestone at elevation 550-650 m a.s.l. Creeping lithophyte on shady slope. Leaves with heavy net of fine white nerves. Rare.
Record creation: 2020-05-19, Аверьянов Леонид ВладимировичCitation: Specimen LE 01073203 // Virtual herbarium of Komarov Botanical Institute RAS — http://re.herbariumle.ru/01073203