Houphan Prov., Viengxay Distr., Xieng Luong village, around point 20°22'06.1''N 104°17'18.6''E. Primary and secondary broad-leaved evergreen dry forest on very steep rocky slopes of highly eroded mountains composed by solid marble-like limestone at elev. 600-700 m a.s.l. Terrestrial herb to 0.5 m tall on shady rocky slope. Not rare.
Record creation: 2026-10-27, Аверьянов Леонид ВладимировичCitation: Specimen LE 01360947 // Virtual herbarium of Komarov Botanical Institute RAS — http://re.herbariumle.ru/01360947