FLORA OF LAOS Orchidaceae Dendrobium aphyllum (Roxb.) C.E.C.Fisch.
Houphan Prov., Viengxay Distr., Xieng Luong village, around point 20°22′06.1′'N 104°17′18.6′'E.
Primary and secondary broad-leaved evergreen dry forest on very steep rocky slopes of highly eroded mountains composed by solid marble-like limestone at elev. 600-700 m a.s.l.
Epiphyte and lithophyte on steep rocky slope near mountain top. Flowers light violet, lip white to pale light yellowish. Occasional.