Laos, Khammoune prov., Boualapha distr., Vang Maner village, around point 17°29′39.3″N, 105°50′24.6″E.
Primary dry evergreen and semideciduous broad-leaved forest on very steep rocky slope near karstic hill top composed with solid, marble-like highly eroded limestone at 350-430 m a.s.l.
Terrestrial herb to 1.5 m tall on rocky slope. Flowers white, median tepal with yellow median stripe margined with red. Not rare.
9 May 2018, L. Averyanov, Khang Sinh Nguyen, T. Maisak, Littideth Xaiyavongsa, Siphanom Keovankham, AL 868.