N.Vietnam, Cao Bang Prov., Trung Khanh Distr., Ngoc Khe Municipality, Pac Nga village, around point 22º54'59''N, 106º31'44''E, at elevation 700-750 m a.s.l. Secondary wet closed evergreen forest on steep rocky slopes of rocky ridges and mesae composed with light gray solid marble-like highly eroded crystalline limestone. Lithophytic fern on rocky steep wet slope. Very common.
Record creation: 2026-02-25, Аверьянов Леонид ВладимировичCitation: Specimen LE 01203643 // Virtual herbarium of Komarov Botanical Institute RAS — http://re.herbariumle.ru/01203643