FLORA OF VIETNAM Orchidaceae Acampe rigida (Buch.-Ham. ex Sm.) P.F.Hunt
Thanh Hoa Prov., Thuong Xuan Distr., Van Xuan Municipality, Hang Cao village, Xuan Lien Natural Reserve.
Remnants of primary and secondary broad-leaved evergreen forest on highly eroded rocky limestone hills at elevation 100-200 m a.s.l. around point 19°50′47.2″N 105°14′42.7″E.
Lithophytic undershrub to 1 m tall on vertical open cliffs near mountain top. Common.