Quang Nam Prov., Dai Loc Distr., Dai Hong municipality, environs of Dai Hong town around point 15°49′01”N 107°56′31”E.
Remnants of primary and secondary dry broadleaved evergreen forest on rocky sandy uplifted plateau composed with eroded sandstone at elev. about 600-650 m a.s.l.
Terrestrial herb to 0.5 m tall along shady slope of small stream. Flowers white. Common.