Son La Prov., Moc Chau Distr., Chieng Son comm., Pha Luong village, Pha Luong Mountains. Primary and secondary evergreen broad-leaved forest on very steep slopes and cliffs of highly eroded red-brown sandstone at elevation 1000-1050 m a.s.l. around point 20°42’02.1N 104°37’23.1E. Lithophytic fern on vertical cliff. Not common.
Record creation: 2026-03-03, Аверьянов Леонид ВладимировичCitation: Specimen LE 01203837 // Virtual herbarium of Komarov Botanical Institute RAS — http://re.herbariumle.ru/01203837