The objectives of this study were to determine the geographic and ecological distribution of Helianthus, Vigtiera, and Tithonia genera in Mexico in order to preserve their species and utilize them in plant breeding and taxonomic studies. Information from the Mexican herbaria: MEXU, ENCB, and CIIDIR was used to localize the areas where wild species of Helianthus, Tithonia, and Wguiera grow. Ten species of Lantana,19 of Tithonia, and 88 of Viguiera were found. Helianthus has its main distribution surrounding the Sierra Madre Occidental and Sierra Madre Oriental highlands. Helianthus annuus has the widest distribution. The Tithonia genus is mainly distributed in the highlands, with T. nbiformis being the most abundant species in this ecological area. The Tithonia genus possibly occupies the ecological area in the highlands, as Helianthus does in the lowlands. Viguiera has the widest distribution, being found in almost all the Mexican States.