Son La Prov., Moc Chau Distr., Chieng Son comm., about 1 km to NE from Chieng Son Village, around point 20°46’02.0N 104°37’03.1E. Remnants of primary broad-leaved evergreen forest on tops of hills composed with karstic highly eroded yellow-white limestone at elevation 1150-1250 m a.s.l. Old trr on steep rocky slope near mountain top. Not common.
Record creation: 2026-03-07, Аверьянов Леонид ВладимировичCitation: Specimen LE 01203901 // Virtual herbarium of Komarov Botanical Institute RAS — http://re.herbariumle.ru/01203901