Vietnam, Quang Binh Prov., Bo Trach Distr., Hung Trach Municipality, Khe Me locality, around point 17º27'51''N, 106º22'46''E at elev. 900-1000 m a.s.l. Slightly logged primary closed broad-leaved evergreen forest on slopes of mountains composed with shale and sandstone. Lithophyte along streamlet. Flowers dull orange. Not rare.