from
The Collaborative International Dictionary of English v.0.48
Verbena \Ver*be"na\, n. [L. See {Vervain}.] (Bot.)
A genus of herbaceous plants of which several species are
extensively cultivated for the great beauty of their flowers;
vervain.
[1913 Webster]
Note: Verbena, or vervain, was used by the Greeks, the
Romans, and the Druids, in their sacred rites.
--Brewer.
[1913 Webster]
{Essence of verbena}, {Oil of verbena}, a perfume prepared
from the lemon verbena; also, a similar perfume properly
called {grass oil}. See {Grass oil}, under {Grass}.
{Lemon verbena}, or {Sweet verbena}, a shrubby verbenaceous
plant ({Lippia citriodora}), with narrow leaves which
exhale a pleasant, lemonlike fragrance when crushed.
[1913 Webster]