Ha Giang Prov., Quan Ba Distr., Tung Vai Commune, Kho My Village, around point 23.08460°N 104.88377°E steep rocky slopes composed with highly eroded limestone at elevation 1000–1250 m a.s.l. Primary evergreen broad-leaved very humid forest. Treelet 2 m tall. Not common (may be common, but widely logged for sale). 6 October 2019, L. Averyanov, Nguyen Sinh Khang, T. Maisak, VR 1404 (HN, LE01061096, LE01066998).