N.Vietnam, Cao Bang Prov., Trung Khanh Distr., Ngoc Khe Municipality, Pac Nga village, around point 22º54'59''N, 106º31'44''E, at elevation 800-850 m a.s.l. Remnants of primary evergreen broad-leaved forest along tops of rocky ridges and mesae composed with light gray solid marble-like highly eroded crystalline limestone. Lithophyte on wet cliff. Common.
Record creation: 2026-02-25, Аверьянов Леонид ВладимировичCitation: Specimen LE 01203662 // Virtual herbarium of Komarov Botanical Institute RAS — http://re.herbariumle.ru/01203662