Ha Giang prov., Quan Ba distr., Cao Ma Po commune, Chin Chu Lin village, around point 23°04ʹ47.2ʺN 104°48ʹ55.6ʺE, steep slopes and flattened top of mountain composed with sandstone at elevation 1800–1950 m a.s.l. Primary evergreen broad-leaved very humid forest. Shrub on open steep slope. Flower buds white. Occasional. 21 October 2018, L. Averyanov, Nguyen Sinh Khang, T. Maisak, Truong Duc Thieu, VR 1176 (HN, LE01055415).