Princeton's WordNet
verbena, vervainnoun
any of numerous tropical or subtropical American plants of the genus Verbena grown for their showy spikes of variously colored flowers
Synonyms:
verbena, vervain
Concise Medical Dictionary, by Joseph C Segen, MD
vervain
Synonyms:
Verbena officinalis, herb-of-the-cross, pigeon's grass
© Synonyms.com