Cyperus setigerus
Cyperus setigerus is a species of sedge that is native to central and southern parts of the United States, recorded from Kansas, Oklahoma, Texas, Missouri, and New Mexico. Taxonomy 

The original spelling of the name combination is Cyperus setigerus, 
Although the orthographic variant Cyperus setiger has been used in some later literature (e.g. McKenzie & Newbold 2020 ) as the classical spelling of the epithet in the nominative masculine is setiger. However, Articles 23 and 60 of the International Code of Nomenclature for algae, fungi, and plants do not allow for subsequent emendation in such cases, as does not meet any of the stated exceptions. See also 
 List of Cyperus species

References 

setigerus
Plants described in 1836
Flora of Texas
Flora of Oklahoma
Flora of Kansas
Flora of Missouri
Flora of New Mexico
Taxa named by John Torrey
Taxa named by William Jackson Hooker
Flora without expected TNC conservation status