Umbrella Sedge

Cyperus involucratus Rottb.

sigh-PEAR-us  in-vol-you-CRATE-us

Cyperaceae

Explanation of name: Cypeiros is the ancient Greek name for sedges of this genus (FER). An involucre is a cluster of leaves forming a cup around a flower cluster.

Synonym: Cyperus alternifolius L. misapplied (WU1), C. alternifolius subsp. flabelliformis Kük. (WU2). Although commonly called Cyperus alternifolius, contemporary authors (see WU1 for Florida) recognize that the ornamental species is C. involucratus, and that the name C. alternifolius belongs to a different species.

Natural range: Africa

Recognition: Large aquatic sedge on the order of a yard tall with a large number of flat leaves arranged into a star pattern resembling radiating spokes immediately beneath the inflorescence.

Landscape uses: A showy species used to decorate shallow wet areas and shores. This invasive exotic species should not be used in South Florida landscaping.

This species is a Category II invasive exotic according to the Florida Exotic Pest Plant Council, and has escaped into scattered wet areas around the state (WU2).