FLORA OF LAOS Orchidaceae Thelasis khasiana Hook.f.?
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.
Clustering epiphyte on mossy tree on rocky mountain top. Not common.