N.Vietnam, Ha Tinh Prov., Huong Son Distr., Son Kim Municipality, Rao Bun stream around point 18º23'39''N, 105º15'12''E. Primary broad-leaved evergreen closed wet forest on very steep shale slopes of river canyon at elevation about 300-400 m a.s.l. Creeping epiphytic vine up to 8 m long. Occasional.
Record creation: 2026-02-28, Аверьянов Леонид ВладимировичCitation: Specimen LE 01203740 // Virtual herbarium of Komarov Botanical Institute RAS — http://re.herbariumle.ru/01203740