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