The Collaborative International Dictionary of English v.0.48:
decumary \decumary\ n. a woody climber of southeastern US (Decumaria barbara) having white flowers in compound terminal clusters. Syn: Decumaria barbata, Decumaria barbara. [WordNet 1.5] DecumbenceWordNet (r) 3.0 (2006):
Decumaria barbara n 1: woody climber of southeastern United States having white flowers in compound terminal clusters [syn: decumary, Decumaria barbata, Decumaria barbara]