Quang Tri Prov., Huong Hoa Distr., Huong Viet municipality around point 16°51’06”N 106°34’38”E.Partially destroyed primary broadleaved evergreen forest on very steep rocky slopes of remnant hills composed with solid highly eroded crystalline limestone at elev. about 600-700 m a.s.l. Terrestrial sedge on shady slope. Locally common.