Houphan Prov., Hem Distr., Nacoc village, Puphadeng mountain, around point 20°09′52.6′'N 103°10′19.4′'E. Primary and secondary broad-leaved evergreen open dry forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 1000-1200 m a.s.l. Terrestrial erect or climbing herb to 2 m tall near mountain top. Occasionbal. LA-VN 1424 12 April 2015 Coll.: N.T.Hiep, L.Averyanov, N.S.Khang, N.Q.Hieu, T.Maisak, Pheng Phengsintham.
Coordinates (geographic position):20° 9′ 52.6″ N, 103° 10′ 19.4″ E ±1000 mRecord creation: 2021-12-02, Tatiana Maisak, PhotoScan D2Citation: Specimen LE 01077623 // Virtual herbarium of Komarov Botanical Institute RAS — http://re.herbariumle.ru/01077623