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Cyperaceae family

Cyperus aggregatus (Willdenow) Endlicher, Cat. Horti Vindob. 1: 93.  1842.
Bas.: Mariscus aggregatus Willdenow (1809).
Syn.: Mariscus cayennensis (Lamarck) Urban (1900).
Syn.: Cyperus cayennensis (Lamarck) Britton (1907).

Indigenous herb of dry savanna, on Maria Island, Vieux Fort.
Guadeloupe, Martinique, St. Lucia, St. Vincent, Greater Antilles, Trinidad, Mesoamerica, South America.
One herbarium specimen. I did not find this species but it may still be there or on other islets.