This is a potted plant but the people who handle it cannot tell me what it is specifically.
This is in southern California, US.
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It's Lantana camara - its a perennial, but is usually grown for its blooms during summer and autumn - its not frost hardy. If you get frosts where you are, you'll need to protect it during winter. The colour of the flowers change over time - more info on that here https://www.gardeningknowhow.com/ornamental/flowers/lantana/color-changing-lantana-flowers.htm