FLORA OF VIETNAM Orchidaceae Acampe rigida (J.E.Smith) P.F.Hunt
N.Vietnam, Thanh Hoa Prov., Ba Thuoc Distr., Co Lung Municipality, Phia village, around point 20o26′44′'N, 105o11′13′'E. Secondary heavily logged evergreen seasonal broad-leaved lowland forest on crystalline marble-like highly eroded limestone, rocky hills at elev. 150-200 m. Lithophytic shrub 1-1.5 m hg on vertical cliffs. Flowers yellow, tepals with brown-orange marks. Very common.