Luang Prabang prov., Ngoy distr., Ngoy village, around point 20°42′52.9′'N 102°41′15.5′'E. Remnants of primary evergreen forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 800-900 m a.s.l. Treelet 3-4 m tall on steep rocky slope. Flowers light yellowish. Not common. LA-VN 1961 1 April 2017 Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.
Coordinates (geographic position):20° 42′ 52.9″ N, 102° 41′ 15.5″ E ±1000 mRecord creation: 2021-12-02, Tatiana Maisak, PhotoScan D2Citation: Specimen LE 01077738 // Virtual herbarium of Komarov Botanical Institute RAS — http://re.herbariumle.ru/01077738