FLORA OF VIETNAM Plants of Phong Nha - Ke Bang National Park Lamiaceae Gen.?
Vietnam, Quang Binh Prov., Bo Trach Distr., Hung Trach Municipality, Khe Ba Tanh locality, around point 17°27′24′'N, 106°23′14′'E at elev. 600-700 m a.s.l.
Slightly logged primary closed broad-leaved evergreen forest on slopes of mountains composed with shale, sandstone and occasionally granite, along rocky stream valley.
Terrestrial and lithophytic herb on open wet mossy stream rocks. Flowers white with violet tint. Rare.