Houphan Prov., Viengxay Distr., Vieng Xai village, around point 20°23′41.3′'N 104°13′44.5′'E. Primary and secondary broad-leaved evergreen dry forest on very steep rocky slopes of highly eroded mountains composed by solid marble-like limestone at elev. 800-950 m a.s.l. Clustering lithophyte on open mossy rocks on mountain top. Common. LA-VN 1141 7 April 2015 Coll.: N.T.Hiep, L.Averyanov, N.S.Khang, N.Q.Hieu, T.Maisak, Somneuk Bouthamounty.
Coordinates (geographic position):20° 23′ 41.3″ N, 104° 13′ 44.5″ E ±1000 mRecord creation: 2020-10-06, Leonid Averyanov, PhotoScan D2. Processing status: work_status_1Citation: Specimen LE 01069967 // Virtual herbarium of Komarov Botanical Institute RAS — http://re.herbariumle.ru/01069967