Hoa Binh Prov., Lac Son Distr., Tu Do Municipality, Mon village, around point 20°24’52”N 105°19’41”E. Secondary evergreen dry broad-leaved forest on steep rocky slopes of remnant mountain composed with highly eroded marble-like solid crystalline limestone at elevation about 300 m a.s.l. Herbaceous vine 5-6 m long in open rocky place. Flowers yellow-orange. Not rare.
Record creation: 2026-03-19, Galina Savich, PhotoScan D2Citation: Specimen LE 01317466 // Virtual herbarium of Komarov Botanical Institute RAS — http://re.herbariumle.ru/01317466