| a North American plant, Proboscidea (Martynia) louisianica, having creamy-white to red flowers blotched with purple, and a woody capsule with a long, curved beak. |
| unicorn plant n. Any of several annual North American herbs of the genus Proboscidea, having large leaves with long petioles and axillary racemes of large purple or creamy-white flowers, grown for their slender protuberant seed pods which may be pickled like cucumbers when young or dried for use in ornamental arrangements. |
unicorn plant
any North American herb of the family Martyniaceae of the flowering plant order Lamiales, and particularly Proboseidea louisianica. There are nine species of unicorn plants, most having large purple or creamy white flowers
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