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. Giang herb to 3 m tall on very steep open slope along rocky river. Inflorescence bracts purple, flowers yellow. Common. 10 October 2019, L. Averyanov, Nguyen Sinh Khang, T. Maisak, VR 1508 (HN, LE01067104, LE01070161). Det.: Jana Skornickova 10.12.2019.