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Helianthus (/?hi?li?æn??s/)[3] is a genus comprising about 70 species of annual and perennial flowering plants in the daisy family Asteraceae commonly known as sunflowers.[4][5] Except for three South American species, the species of Helianthus are native to North America and Central America. The best-known species is the common sunflower (Helianthus annuus).[6] This and other species, notably Jerusalem artichoke (H. tuberosus), are cultivated in temperate regions and some tropical regions, as food crops for humans, cattle, and poultry, and as ornamental plants.[7] The species H. annuus typically grows during the summer and into early fall, with the peak growth season being mid-summer.[8]