*bena*

prop. n. A genus of chiefly terrestrial orchids with tubers or fleshy roots often having long slender spurs and petals and lip lobes; it includes species formerly placed in the genus Gymnadeniopsis.
Syn. -- genus Habenaria. [ WordNet 1.5 ]

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 ]

☞ 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 ]

a. (Bot.) Of or pertaining to a natural order (Verbenaceae) of gamopetalous plants of which Verbena is the type. The order includes also the black and white mangroves, and many plants noted for medicinal use or for beauty of bloom. [ 1913 Webster ]