Ruellia is a genus of flowering plants commonly known as Ruellias or Wild petunias. They are not closely related to petunias although both genera belong to the same euasterid clade. The genus was named in honor of Jean Ruelle, herbalist and physician to Francis I of France and translator of several works of Dioscorides.

Ruellia elegans (Red ruellia, Brazilian petunia) is native to Brazil. It has bright red leaning toward scarlet (the "Rio Red" variety) trumpet shaped five-petaled 1 to 2 inch flowers which resemble salvia greggi flowers in shape. They appear on 6 to 8 inch wand-like stems. The upper petals tend to flare out and back, while the lower one curls out and downward, a landing pad that leads pollinators to its small white heart. The blooms, loved by butterflies and hummingbirds, appear from May until frost. It will take light frosts and dies back at about 28 degrees. It forms a 12 inch high by 24 inch in diameter mound of soft green, semi-fuzzy foliage.

Brazilian Petunia Ruellia elegans. Dispatched with Royal Mail 1st Class.