Petunia integrifolia

Petunia integrifolia, also known as Petunia violacea and as the violet petunia or violetflower petunia, is a species of wild petunia with violet-colored blooms. Petunia integrifolia is native to Argentina. The flower is a wild (non-hybrid) variety that produces approximately 1.5 inch blooms, typically smaller and harder to cultivate than the more popular and common home garden varieties.