Vietnam, Thua Thien – Hue Prov., A Luoi Distr., Hong Van Municipality, Ta Lo village, around point 16°21'52''N, 107°09'36''E at elevation about 800-1000 m a.s.l.
Secondary wet broad-leaved closed forest on steep mountain slopes composed with shale and granite.
Herbaceous or hemi-woody vine 2-4 m long on wet grassy rocky slope along trail. Rare.
Record creation: 2021-11-09, Leonid Averyanov, PhotoScan D2Citation: Specimen LE 01089074 // Virtual herbarium of Komarov Botanical Institute RAS — http://re.herbariumle.ru/01089074