N.Vietnam, Ha Tinh Prov., Huong Son Distr., Son Hong Municipality, around point 18º34'06''N, 105º11'40''E. Primary broad-leaved evergreen riparian forest with Platanus kerrii and Duabanga grandiflora along rocky Song Con river valley composed with shale and gray sandstone at elevation 250-300 m a.s.l. Lithophytic fern in shady places. Very common.
Record creation: 2026-03-01, Аверьянов Леонид ВладимировичCitation: Specimen LE 01203748 // Virtual herbarium of Komarov Botanical Institute RAS — http://re.herbariumle.ru/01203748