Laos, Khammoune prov., Boualapa distr., Langkhang village, steep southern slopes of sandstone ridge allied to the road from the north between points 17°34′02.2″N 105°42′42.6″E, 200 m and 17°34′51.1″N 105°43′01.2″E, 535 m a.s.l.
Primary lowland semideciduous and evergreen dry forest on very steep rocky slopes.
Epiphyte on tall tree. Sepals and petals white with violet tint, lip white with light yellowish tint. Occasional.
15 May 2018, L. Averyanov, Khang Sinh Nguyen, T. Maisak, AL 1093 (photo only).
Polygonaceae Persicaria pulchra (Blume) Sojak AL 683.