Ha Giang Prov., Quan Ba Distr., Thai An Commune, Seo Lung Two Village, around point 22.96988°N 105.08646°E. Very steep mountain slopes composed of stratified shale and clayey subsoil at elevation 800–1000 m a.s.l. Primary and secondary evergreen broad-leaved humid forest. Treelet or shrub 3-4 m tall in open place along trail. Flowers buds white. Occasional. 10 October 2019, L. Averyanov, Nguyen Sinh Khang, T. Maisak, VR 1533 (HN, LE01067128, LE01070227).