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Helianthus Helianthus angustifolius previously known as: Coreopsis angustifolia Helianthus annuus Helianthus atrorubens Helianthus decapetalus previously known as: Helianthus strumosus Helianthus divaricatus Helianthus maximiliani Helianthus microcephalus Helianthus occidentalis previously known as: Helianthus dowellianus, Helianthus occidentalis var. dowellianus