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. Terrestrial herb 20-40 cm tall in shady place. Locally common. LA-VN 1115 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: 2021-12-02, Tatiana Maisak, PhotoScan D2Citation: Specimen LE 01077611 // Virtual herbarium of Komarov Botanical Institute RAS — http://re.herbariumle.ru/01077611