It can be confused with Stephania japonica, but has softer foliage and small, soft, recurved hooks on the stems. Weak twiner with stems and petioles with prickles 1-2 mm long; dioecious.
Stephania, a genus of climbing plants, named in honour of Frederick Stephan, (1757-1814), director of the St. Petersburg Botanic Garden. (Another more likely derivation is based on the Greek stephanos a crown, alluding to the anthers being united and forming a crown).
Photo: Robert Whyte