The big, round desert marigold is a gorgeous yellow flower that feature dozens of long, thin petals arranged in clusters around a single center. A single stem of the sunny flower may feature two to three flowers. Though the annual plants are usually found naturally growing in the American Southwest to Mexico, other people may cultivate them specifically for their large, lovely flowers. It does grow best in the desert, after all, but it can pretty much be grown anywhere if cared for properly.