FLORA OF VIETNAM Asclepiadaceae Hoya lockii The P.V. et Aver.,
Vietnam, Thua Thien – Hue Prov., A Luoi Distr., Hong Van Municipality, Ta Lo village, around point 16°23′44′'N, 107°09′15′'E at elevation about 1000-1150 m a.s.l.
Secondary wet closed broad-leaved forest on very steep mountain slopes and edges of ridges composed with shale.
Epiphytic vine 1-2 m long. Flowers white. Not common.