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Helianthus ciliaris, Helianthus cusickii, Helianthus debilis, Helianthus decapetalus, Helianthus deserticola, Helianthus divaricatus, Helianthus eggertii,

sometimes included within H. decapetalus, e.g., H. decapetalus var. multiflorus (Linnaeus) A. Gray; its parents are H. decapetalus and H. annuus. None. None

or sparsely scabrous, glaucous leaves. Its closest relative may be H. decapetalus, which has larger heads and, usually, longer phyllaries. None. None. window

taxonomic recognition. Hybridization with other polyploids, including H. decapetalus, H. hirsutus, and H. tuberosus, further complicates the situation. It