pelican flower

Wiktionary

1. n. Any of several tropical vines of the genus Aristolochia (especially Aristolochia grandiflora) the shape of whose flowers suggests a pelican

GNU Webster's 1913

1. n. (Bot.) the very large and curiously shaped blossom of a climbing plant (Aristolochia grandiflora) of the West Indies; also, the plant itself.