Vietnam, Thua Thien – Hue Prov., Huong Thuy Distr., Duong Hoa Municipality, Huong Thuy forest enterprise territory, around point 16°12′50′'N, 107°36′29′'E, mountain and hill slopes composed with shale at elevation about 200-250 m a.s.l.
Fractionally logged primary and secondary closed evergreen broad-leaved forest on steep stream slopes.
Terrestrial sedge up to 1.5 m tall on wet stream slopes along rocky stream valley. Locally very common. Occasional co-dominant of herb forest stratum. HAL 8254 14 May 2005.