Vientiane prov., Vang Vieng distr., Patang village, around point 19°04′15.6′'N 102°24′33.2′'E.
Secondary broad-leaved semi-deciduous dry forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. about 670 m a.s.l.
Deciduous treelet 3-4 m tall on exposed rocks. Flowers white. LA-VN 1598 23 March 2017 Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Khamla Inkhavilay, Hongthong Southyvohanh, Pinmany Sisavath, Chanthala Cheuaysamphanh.