N. Vietnam, prov. Cao Bang, distr. Bao Lac, municipality Yen Lac, vicinities of Yen Lac village (N 22°44′ E 105°50′). Primary semideciduous broadleaved forest on steep slopes and bluffs of S. exposition near the tops of remnant karst limestone ridge at 1200-1300 m elev. Herb vine up to 10 m lg. Rare.
CBL 1481 16 April 1999
International Botanical Expedition of the U.S.A. National Geographic Society (grant No 6300-98)
Collectors: P.K.Loc, P.H.Hoang, Averyanov L.
Coordinates (geographic position):22° 44′ N, 105° 50′ E ±1000 mRecord creation: 2020-10-17, Leonid Averyanov, PhotoScan D2Citation: Specimen LE 01073986 // Virtual herbarium of Komarov Botanical Institute RAS — http://re.herbariumle.ru/01073986