FLORA OF LAOS Asclepiadaceae Hoya verticillata (Vahl) G. Don
Luang Prabang prov., Pon Xay distr., along the way to Bane Phou Souong village, Pha Hiua Bin Toc Mountain, around point 19°57′37.0′'N 102°25′03.0′'E.
Degraded primary evergreen and semideciduous forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 600-850 m a.s.l.
Creeping semi-woody epiphytic and lithophytic vine on open rocky slope near mountain top. Flowers white, corona white with purple center. Not rare.