Quang Tri Prov., Huong Hoa Distr., Huong Lap municipality around point 16°57’03”N 106°35’17”E. Highly destroyed primary broadleaved evergreen forest on shale along rocky mountain stream at elev. about 600 m a.s.l. Undershrub to 2 m tall on shady wet stream bluffs. Flowers pink-purple, anthers white, young leaves purple-violet. Very common.