umbrella papyrus, umbrella sedge or umbrella palm

Cyperus alternifolius (umbrella papyrus, umbrella sedge or umbrella palm) is a grass-like plant in the very large genus Cyperus of the sedge family, Cyperaceae. It is native to Madagascar, but is frequently cultivated worldwide. The subspecies Cyperus alternifolius ssp. flabelliformis is also known as Cyperus flabelliformis = Cyperus involucratus Rottb.