Helianthus annuus (common sunflower) native to the SW USA is now cultivated for its edible oil. The feral plant has probably become extinct.

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Photo credit: © Peter Martin Rhind / Alamy / Afripics
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Keywords: angiosperm, annual, annuus, asteraceae, common, compositae, daisy, edible, family, flower, garden, helianthus, herbaceous, large, native, oil, plant, sunflower, usa