N.Vietnam, Cao Bang Prov., Trung Khanh Distr., Ngoc Khe Municipality, Pac Nga village, around point 22º54'59''N, 106º31'44''E, at elevation 600-650 m a.s.l. Closed secondary broad-leaved evergreen wet forest on very steep rocky slopes of rocky ridges and mesae composed with light gray solid marble-like highly eroded crystalline limestone. Canopy epiphyte on shrubs 3-4 m tall in very wet shady mossy place. Flowers light yellowish. Rare.
Record creation: 2020-06-06, Аверьянов Леонид ВладимировичCitation: Specimen LE 01073377 // Virtual herbarium of Komarov Botanical Institute RAS — http://re.herbariumle.ru/01073377