Calabar beanCal·a·bar bean
Origin of Calabar beanafter Calabar, and the Calabar River, on which it is situated
Origin of Calabar beanAfter Calabar, a town of southeast Nigeria.
(plural Calabar beans)
It derives the first part of its taxonomic name from a curious beak-like appendage at the end of the stigma, in the centre of the flower; this appendage, though solid, was supposed to be hollow (hence the name from Ancient Greek φῦσα (phusa), a bladder, and stigma).