Cyperus polystachyos (Manyspike Flatsedge) is a species of annual grass in the family sedges. They are associated with freshwater habitat. They are native to Piauí, Mata Atlântica, Pampa, Alagoas, Minas Gerais, Sergipe, Maranhao, Santa Catarina, Distrito Federal, Roraima, Mato Grosso Do Sul, Amazônia, Cerrado, ParaíBa, Pacific Basin excluding Hawaii, Rio Grande Do Norte, Ceará, Caatinga, U.S. Virgin Islands, The Contiguous United States, Pernambuco, GoiáS, Paraná, Tocantins, Rio De Janeiro, Bahia, Espirito Santo, Rio Grande Do Sul, Puerto Rico, Pará, SãO Paulo, Mato Grosso, Hawaii, RondôNia, and Pantanal. They have green flowers. Individuals can grow to 1.6 feet.
EOL has data for 66 attributes, including: