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petunia
Petunia is a widely cultivated genus of flowering plants of South American origin, closely related with tobacco, cape gooseberries, tomatoes, deadly nightshades, potatoes and chili peppers; in the family Solanaceae. The popular flower derived its name from French, which took the word petun, meaning "tobacco," from a Tupi–Guarani language. Most of the varieties seen in gardens are hybrids (Petunia × hybrida
It looks like a Proven Winner's Calibrachoa which is common name Million Bells or Superbells. If it's the side of a tennis ball diameter, then it's a petunia. What is the branching habit? trailing? compact? and flower size?