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. Erect terrestrial and lithophytic herb, later herbaceous or semi-woody vine on rocky slope. Not common. 10 May 2018, L. Averyanov et al., AL 890.
Record creation: 2021-11-12, Leonid Averyanov, PhotoScan D2Citation: Specimen LE 01122854 // Virtual herbarium of Komarov Botanical Institute RAS — http://re.herbariumle.ru/01122854