• WordNet 3.6
    • n Physostigma African woody vines: calabar beans
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Century Dictionary and Cyclopedia
    • n physostigma A genus of leguminous plants of the tribe Phaseoleæ and subtribe Euphaseoleæ, characterized by the spiral keel and by the continuation of the bearded style above the stigma into a large and oblique hollow hood. The only species, P. venenosum, is a high-twining vine of tropical Africa, with leaves of three large leaflets, and axillary pendulous racemes of purplish flowers, followed by long dark-brown compressed pods, each with two or three thick oblong highly poisonous seeds of valuable medicinal powers. See Calabar bean (under bean), chop-nut, eserine, and physostigmine.
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