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. Terrestrial herb to 1.5 m tall in shady place along rocky stream. Flowers yellow. Not common. 22 October 2018, L. Averyanov, Nguyen Sinh Khang, T. Maisak, Truong Duc Thieu, VR 1223. Det.: Sheng Xiang Yu & K.S. Nguyen 14.10.2019. (HN, LE01050324).