Quang Binh Prov., Minh Hoa Distr., Dan Hoa Municipality, to the EEN of Bai Dinh village around point 17°46′34”N 105°48′56”E.
Primary broad-leaved closed wet forest on very steep rocky slopes and cliffs of low remnant mountains composed with highly eroded solid marble-like limestone at elevation about 700-800 m a.s.l.
Terrestrial and lithophytic climbing shrub or woody vine to 3-4 m on wet rocky very steep slope. Not common.
HAL 12551 11 February 2009 Coll.: L.Averyanov, P.K.Loc, N.T.Vinh, L.T.Son.