Ruellia simplex, commonly known as the Mexican petunia, is a perennial flowering plant native to tropical regions of the Americas. It features vibrant purple or blue trumpet-shaped flowers that bloom throughout the year, attracting various pollinators like bees and butterflies. The plant typically grows in clumps and can reach heights of 1 to 3 feet. This species thrives in well-drained soil and prefers full sun to partial shade. Ruellia simplex is often used in landscaping for its ornamental value and ability to tolerate drought conditions. However, it can become invasive in some areas, so careful management is recommended.