Cyperus macrophyllus
Cyperus macrophyllus is a species of sedge that is native to the Cook Islands, Pitcairn Islands, and Society Islands in the Pacific Ocean. See also 
 List of Cyperus species

References 

macrophyllus
Plants described in 1870
Flora of the Cook Islands
Flora of the Society Islands
Flora of the Pitcairn Islands
Taxa named by Johann Otto Boeckeler