Cosmos originates from tropical America. Colours are red, yellow, white, pink, or purple. There are about 20 species of Cosmos. The common garden cosmos is Cosmos bipinnatus. Another species called Cosmos atrosanguineus is quite popular. It is also known as Chocolate Cosmos because of its chocolate-scented maroon-crimson flowers. Cosmos atrosanguineus is native to Mexico, where it is extinct in the wild.