Laos, Khammoune prov., Boualapha distr., Ban Dou village, around Khuay cave, at 17°30'35.1"N, 105°51'28.7"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 250-390 m a.s.l. Achlorophyllous terrestrial herb on shady rocky slope. Flowers white, lateral sepals with reddish-orange stripes in basal half, lip light violet, column white. Locally common. 10 May 2018, L. Averyanov, Khang Sinh Nguyen, T. Maisak, Littideth Xaiyavongsa, Siphanom Keovankham, AL 891.
Coordinates (geographic position):17° 30′ 35.1″ N, 105° 51′ 28.7″ E ±1000 mRecord creation: 2019-04-02, Аверьянов Леонид Владимирович. Processing status: work_status_1Citation: Specimen LE 01048781 // Virtual herbarium of Komarov Botanical Institute RAS — http://re.herbariumle.ru/01048781