Genus Cosmos has about 20 species of annual and perennial plants in the Asteraceae family, the family of sunflowers, Daisies and Asters. Cosmos genus includes, Cosmos bipinnatus, commonly known as Mexican Aster and Cosmos sulphureus, Yellow Cosmos , and Cosmos atrosanguineus Chocolate Cosmos.
Cosmos flowers are produced in a capitulum. Cosmos flower Capitulum is surrounded by a ring of broad ray florets and a center of disc florets. There is a lot of color variation in between the species. Cosmos flowers are 2-4 inches in diameter. Cosmos flowers come in brightly colored single or double flowers which include white, pink, orange, yellow, and scarlet colors.