vervain

Definition of Vervain in English :

1. verbena, vervain

any of numerous tropical or subtropical American plants of the genus Verbena grown for their showy spikes of variously colored flowers

WordNet Lexical Database for English. Princeton University. 2010.

Vervain

noun

any of several verbenaceous plants of the genus Verbena, having square stems and long slender spikes of purple, blue, or white flowers

noun

1.

any of a number of verbenas

; esp.,

a.

the European vervain (Verbena officinalis), formerly used in folk medicine

b.

any of several species of North American verbena, not generally cultivated

adjective

2.

verbena

n.