Xiangkhouang Prov., Kham Distr., Huad village, Phou tat Vinh mt., around point 19°32′31.6′N 103°39′40.4′E. Primary and secondary broad-leaved evergreen and semideciduous dry forest on very steep rocky slopes of limestone highly eroded mountains composed by solid marble like limestone at elev. 1200-1400 m a.s.l. Epiphyte on old trees along ridge edge. Not common. LA-VN 1082 / TM 1263 4 April 2015 photos. Coll.: N.T.Hiep, L.Averyanov, N.S.Khang, N.Q.Hieu, T.Maisak, Pheng Phengsintham.
Herbarium prepared in 13.05.2019. Flowers: tepals pale yellow with brown-red stripes, lip pale yellow. L. Averyanov. Photos.
Herbarium prepared in 11.05.2020. Flowers: tepals pale yellow with brown-red stripes, lip pale yellow. L. Averyanov. Photos.