Ha Giang prov., Quan Ba distr., Cao Ma Po commune, Va Thang 1 village, around point 23°05ʹ52.6ʺN 104°51ʹ26.4ʺE, steep alluvial slopes and flattened mountain summits based on limestone at elevation 1400–1480 m a.s.l. Primary evergreen broad-leaved very humid forest. Erect terrestrial herb to 1 m tall in shady place. Flowers white with pink tint. Very common. 22 October 2018, L. Averyanov, Nguyen Sinh Khang, T. Maisak, Truong Duc Thieu, VR 1196 (HN, LE01055408, LE01055409).