FLORA OF VIETNAM Costaceae Costus speciosus (Koenig) Sm.
Vietnam, Thua Thien – Hue Prov., Nam Dong Distr., Huong Son Municipality, around point 16°09′58′'N, 107°36′07′'E.
Fractionally logged primary closed broad-leaved evergreen lowland forest along La Ma River on very steep hill slopes composed with clayey shale and sandstone at elevation 300-400 m a.s.l.
Terrestrial herb up to 1.5 m tall along rocky stream valley. Common.