verbena (n.) Look up verbena at Dictionary.com
genus of plants, the vervain, 1560s, from Latin verbena "leaves or twigs of olive, myrtle, laurel, or other sacred plants employed in religious ceremonies," from PIE *werbh- (cognates: Lithuanian virbas "twig, branch, scion, rod"), from root *werb- "to turn, bend" (see warp (v.)).