N.Vietnam, Bac Kan Prov., Na Ri Distr., Liem Thuy Municipality, village Lung Vai, around point 21є57'18''N, 106є06'12''E, at elevation 500-700 m a.s.l. Primary broad-leaved evergreen closed wet forest on very steep slopes and cliffs of rocky ridges and mesae composed with white solid marble-like crystalline limestone. Woody vine or climbing shrub on very steep open rocky slope. Flowers white. Occasional.
Record creation: 2026-02-26, Galina Savich, PhotoScan D2Citation: Specimen LE 01318923 // Virtual herbarium of Komarov Botanical Institute RAS — http://re.herbariumle.ru/01318923