Quang Nam Prov., Dai Loc Distr., Dai Hong municipality, environs of Dai Hong town around point 15°49′44”N 107°57′19”E. Remnants of primary and secondary dry broadleaved evergreen forest on rocky sandy uplifted plateau composed with eroded sandstone at elev. about 550 m a.s.l. Epiphyte on old trees in shady place. Flowers yellowish to light violet. Not rare.