FLORA OF VIETNAM
Apocynaceae

Hoa Binh Prov., Lac Son Distr., Ngoc Son Municipality, Khu Village, Bua Coi Mt., around point 20°27′10”N 105°18′52”E.

Edges of heavily logged closed primary evergreen broad-leaved forest on slopes of limestone mts., at elevation about 700-790 m a.s.l.

Woody vine. Flower buds brownish. Rather common.

CPC 1733 29 March 2011 Coll.: N.Q.Hieu, L.Averyanov, N.T.Hiep, P.K.Loc, P.V.The, N.T.Vinh, T.B.Ngan, N.Tap, D.D.Dao, V.T.Ha.