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noun any of numerous tropical or subtropical American plants of the genus Verbena grown for their showy spikes of variously colored flowers
originBorrowed from Latin verbēna (“leaves or twigs of olive, myrtle, laurel, or other sacred plants employed in religious ceremonies”), from Proto-Indo-European *werbʰ-. Doublet of vervain, via French.
Etymology from Wiktionary, CC BY-SA 3.0