title: How old is the sunflower in Mexico?
authors.forename: Charles B
authors.initials: CB
authors.lastname: Heiser
mesh_terms: D000884:Anthropology, Cultural; D001106:Archaeology; D018556:Crops, Agricultural / Q000502:physiology*; D006368:Helianthus / Q000502:physiology* / Q000648:ultrastructure; D049690:History, Ancient; D008037:Linguistics; D008800:Mexico