I found this awesome picture of red Zinnia flower after searching for similar flower of Dahlia. As I mentioned on previous post that Zinnia flower looks so similar with Dahlia flower. Zinnia is a genus of plants of the sunflower tribe within the daisy family. Zinnia flowers are annuals, shrubs, and sub-shrubs native primarily to North America. Zinnia flowers may be white, chartreuse, yellow, orange, red, purple, or lilac. The flowers have a range of appearances, from a single row of petals to a dome shape.