Vietnam, Tay Ninh Prov., Tan Bien Distr., Tan Binh Municipality, around point 11º38’27’’N 105º51’23’’E at elev. about 15 m a.s.l. Dry secondary dipterocarp woodlands and grasslands on alluvial swampy ferralite soils. Terrestrial tuberiferous herb up to 1.2 m tall in open wet places. Flowers white, with light lemon fragrance. Rare.