VERVAIN
verbena, vervain
(noun) any of numerous tropical or subtropical American plants of the genus Verbena grown for their showy spikes of variously colored flowers
Source: WordNet® 3.1
Etymology
Noun
vervain (countable and uncountable, plural vervains)
A herbaceous plant, Verbena officinalis, common in Europe and formerly held to have medicinal properties.
Source: Wiktionary
Ver"vain, n. Etym: [OE. verveine, F. verveine, fr. L. verbena, pl.
verbenae sacred boughs of laurel, olive, or myrtle, a class of
plants; cf. verbenaca vervain. Cf. Verbena.] (Bot.)
Definition: Any plant of the genus Verbena. Vervain mallow (Bot.), a
species of mallow (Malva Alcea) with rose-colored flowers.
Source: Webster’s Unabridged Dictionary 1913 Edition