FLORA OF VIETNAM Plants of Halong Bay National Park Asclepiadaceae Secamone elliptica R.Br.
Vietnam, Quang Ninh Prov., Ha Long city, Ha Long Bay, around Trinh Nu Cave at elev. 20-40 m a.s.l.
Secondary closed broad-leaved evergreen forest and shrubs on very steep rocky slopes and cliffs of remnant island mountains composed with solid highly eroded crystalline limestone.
Lithophytic and epiphytic herbaceous vine up to 3-4 m long on open coastal rock outcrops. Flowers light yellowish-green. Common.