Actually called Giant Dwarf papyrus, this plant is hardy only in zones 9-11 so I move it into the greenhouse in the winter.
Kingdom : Plantae
Division : Magnoliophyta
Class : Liliopsida
Subclass: Commelinidae
Order : Poales
Family : Cyperaceae
Subfamily: Cyperoideae
Tribe : Cypereae
Genus : Cyperus
Species: percamenthus