Britton's wild petunia
- kingdom: Plantae
- phylum: Tracheophyta
- class: Magnoliopsida
- order: Lamiales
- family: Acanthaceae
- genus: Ruellia
- species: Ruellia simplex
Ingeniero Guillermo N. Juárez
Formosa
ArgentinaRio Brilhante
Mato Grosso do Sul
BrazilAntiguo Cuscatlán
La Libertad
El SalvadorDenver
ColoradoJean Lafitte
LouisianaWashington, D. C.
Washington, D.C.
United States