FLORA OF VIETNAM Gentianaceae Swertia macrosperma (C.B. Clarke) C.B. Clarke?
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 20-50 cm tall in open wet rocky place. Flowers greenish, inside with dirty violet marks. Locally common.