Cao Bang Prov., Bao Lac Distr., Hong An municipality, Lung Pan village.
Open secondary scrub and grasslands on steep alluvial slope of limestone hill along road at elevation about 1050 m a.s.l. around point 22°48′50.5″N 105°46′28.0″E.
Terrestrial herb to 2.5 m tall in open slope. Common weed in the area.