"Genus named after Tithonus, a handsome youth and king of Troy, who was loved by Aurora who turned him into a grasshopper. Grown as a border plant and cultivated as green manure plant. Flowers used in traditional medicine."
Isolectotype for Tithonia diversifolia (Hemsl.) A. Gray Catalog Number: US 42401 Collection: Smithsonian Institution, National Museum of Natural History, Department of Botany Verification Degree: Original publication and alleged type specimen examined Preparation: Pressed specimen Collector(s): E. Bourgeau Year Collected: 1866 Locality: Valley of Orizaba., Veracruz, Mexico, North America
Isolectotype: Hemsley, W. B. 1881. Biol. Centr.-Amer., Bot. 2: 168.; La Duke, J. C. 1982. Rhodora. 84: 498.