Northern Vietnam, Lao Cai Prov., Van Ban Distr., Khanh Yen Ha municipality, elevation from Na Nheo village to the S from 680 to 880 m a.s.l. (around point 21ø59'24''N, 104ø16'23''E). Primary evergreen broad-leaved submontane forest on steep granite and quartzite slopes at elev. 800-880 m a.s.l. Terrestrial herb with white fragrant flowers. Very common. Usual co-dominant of herb stratum.