Setaria parviflora (Knotroot Foxtail) is a species of perennial grass in the family True grasses. They have a self-supporting growth form. They are native to U.S. Virgin Islands, The Contiguous United States, Puerto Rico, Eastern North America, Tocantins, Mato Grosso Do Sul, Maranhao, Rio Grande Do Sul, Roraima, Alagoas, Santa Catarina, GoiáS, Pará, Bahia, Cerrado, Rio Grande Do Norte, Caatinga, Amapá, SãO Paulo, Minas Gerais, Mato Grosso, Acre (Brazil), Pernambuco, Mata AtlâNtica, Distrito Federal, Espirito Santo, Piauí, Paraná, AmazôNia, Rio De Janeiro, Sergipe, ParaíBa, Mata AtlâNtica, Paraná, and Rio Grande Do Sul. They have simple, broad leaves. Flowers are visited by Barred Yellow. Individuals can grow to 0.25 m.
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