FLORA OF LAOS Orchidaceae Acampe rigida (Buch.-Ham. ex Sm.) P.F.Hunt
Luang Prabang prov., Pon Xay distr., between Houay Man and Nam Bo villages, Phou Hua Ben Toc Mountain, around point 19°57′33.1′'N 102°25′25.8′'E.
Degraded primary evergreen and semideciduous forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 500-650 m a.s.l.
Lithophytic undershrub on open steep rocky slope near mountain top. Common.