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Sunflowers, a member of aster family native to North America, were and still is cultivated for their oil and their edible seeds  The spanish name of sunflower is girasol which means to turn with the sun, a behavior that is characteristic of the plant 
Chimalacatle was the name cited by Hernandez Historia de las plantas de Nueva España. In 1890, as “la flor que llaman del sol” in Joseph de Acosta Historia Natural.
Human consumption is deposited as coprolites 
Will et Burke (2006) stated a single origin of domesticated sunfower at east central US (cf. Heiser 1954), also by the evidence of charcoal of the fruit of the plant (i.e. achene) 4000 YBP
- Smith B D 2014 The domestication of Helianthus annuus L. (sunflower) Veget Hist Archaeobot 23:57–74.