Petunia \Pe*tu"ni*a\, n. [NL., fr. Braz. petun tobacco.]

(Bot.) A genus of solanaceous herbs with funnelform or salver-shaped corollas. Two species are common in cultivation, Petunia violacera, with reddish purple flowers, and P. nyctaginiflora, with white flowers. There are also many hybrid forms with variegated corollas.

Source: Webster's Revised Unabridged Dictionary (1913)