Quang Nam Prov., Dai Loc Distr., Dai Hong municipality, environs of Dai Hong town around point 15°49’44”N 107°57’19”E. Rich secondary closed broadleaved evergreen forest on very steep rocky slopes composed with eroded sandstone along high waterfall sides at elev. about 250 m a.s.l. Terrestrial herb on very steep rocky shady slope. Flowers dark violet to nearly almost black, fruits glossy blue. Very common.