N.Vietnam, Ha Tinh Prov., Huong Son Distr., Son Kim Municipality, Rao Bun stream around Rao An FPD station at 18є25'18''N, 105є13'15''E. Primary and secondary broad-leaved evergreen closed wet forest on very steep shale slopes of river canyon at elevation about 200-300 m a.s.l. Woody vine 12-18 m long. Flowers greenish-white outside, dull brownish inside. Occasional.
Record creation: 2026-10-19, Аверьянов Леонид ВладимировичCitation: Specimen LE 01360712 // Virtual herbarium of Komarov Botanical Institute RAS — http://re.herbariumle.ru/01360712