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== Referències ==
== Referències ==
* [https://www.biodiversitylibrary.org/page/358925 Linné, Carl von,Species Plantarum, vol. 2, p. 904, 1753.]
* [Heiser, Jr., Charles B., 1951. «The Sunflower among the North American Indians.» Proceedings of the American Philosophical Society, Vol. 95, No. 4 pp. 432-448]
* Heiser, Jr., Charles B., 1951. «The Sunflower among the North American Indians.» Proceedings of the American Philosophical Society, Vol. 95, No. 4 pp. 432-448
* [Heiser, Jr., Charles B. 1955. «Origin and development of the cultivated sunflower.» Am. Biol. Teacher Vol. 17, No. 4 pp. 161-167]
* Heiser, Jr., Charles B. 1955. «Origin and development of the cultivated sunflower.» Am. Biol. Teacher Vol. 17, No. 4 pp. 161-167
== Bibliografia ==
== Bibliografia ==