Rhipsalis pterocaulis
Detail from S&D 1923
Pfeiffer (Enum. Cact. 140. 1837) gives Cereus pterocaulis Hortus as a synonym of Lepismium paradoxum while Forster (Handb. Cact. 453. 1846) gives Rhipsalis pterocaulis as a synonym of R. paradoxa.