N.Vietnam, Ha Tinh Prov., Huong Son Distr., Son Hong Municipality, around point 18º34'06''N, 105º11'40''E. Heavily logged primary broad-leaved evergreen dry forest on steep mt slopes composed with shale at elev about 250-350 m a.s.l. along Song Con river valley. Lithophytic fern in shady places. Rare.
Record creation: 2026-02-28, Аверьянов Леонид ВладимировичCitation: Specimen LE 01203739 // Virtual herbarium of Komarov Botanical Institute RAS — http://re.herbariumle.ru/01203739