Quang Binh Prov., Minh Hoa Distr., Dan Hoa Municipality, Bai Dinh village around point 17°45′28”N 105°46′14”E.
Remnants of primary evergreen broad-leaved forest on very steep slopes and on tops of low remnant hills composed with highly eroded marble-like solid limestone at elevation about 200-300 m a.s.l.
Creeping lithophytic vine to 15 m long on exposed tall vertical limestone cliff. Flowers and fruits white, spathe green to olive-green. Locally very common.
HAL 12368 7 February 2009 Photo. Coll.: L.Averyanov, P.K.Loc, N.T.Vinh, L.T.Son.