FLORA OF VIETNAM Apocynaceae (Asclepiadoideae) Hoya lockii The P.V. et Aver. Quang Binh Prov., Minh Hoa Distr., Hoa Son municipality, B’Lam Lang limestone mt., around point of dipterocarp forest, 17°42′15.8”N 105°48′24”E.
Primary logged closed evergreen broad-leaved forest on silicat valley at elevation about 534 m a.s.l.
Epiphyte, ca. 1 m long. Flowers white. Occasional.