Cyperus retrofractus Engelm. Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Tracheophyta class Liliopsida order Poales family Cyperaceae genus Cyperus species Cyperus refractus Name Homonyms Cyperus retrofractus (L.) Torr. Cyperus retrofractus Willd. ex Boeckeler, 1870 Cyperus retrofractus Engelm. ex Steud. Cyperus retrofractus Engelm. Cyperus retrofractus Willd.