Tithonia

Tithonia is a genus of flowering plants in the sunflower tribe within the Asteraceae family. Tithonia has a center of distribution in Mexico but with one species extending into the Southwestern United States and several native to Central America. Two species, T. diversifolia and T. rotundifolia, are widely cultivated and have escaped to become weeds in tropical and subtropical areas around the world. The distinguishing feature of the genus is the peduncle, which is fistulose (meaning hollow and flaring toward the apex). The plants are coarse annual or perennial herbs or shrubs, and one species, T. koelzii, is a small tree. see Comaclinium Enceliopsis Lasianthaea Viguiera Media related to Tithonia at Wikimedia Commons Data related to Tithonia at Wikispecies