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. Tree to 30 m tall on steep mountain slope. Not common. 10 October 2019, L. Averyanov, Nguyen Sinh Khang, T. Maisak, VR 1547 (HN, LE01067135, LE01067138, LE01067175, LE01070151). Det.: Sawai Mattapha 29.11.2019.