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Helianthus or sunflower (/ˌhiːliˈænθəs/)[2] is a genus of plants comprising about 70 species[3] in the family Asteraceae.[4] Except for three species in South America, all Helianthus species are native to North America. The common name, “sunflower”, typically refers to the popular annual species Helianthus annuus, or the common sunflower, whose round flower heads in combination with the ligules look like the sun.[5] This and other species, notably Jerusalem artichoke (H. tuberosus), are cultivated in temperate regions and some […]
