Carex nigra f. recta (Fleischm.) J.Kern & Reichg. Dataset GBIF Backbone Taxonomy Rank FORM Classification kingdom Plantae phylum Tracheophyta class Liliopsida order Poales family Cyperaceae genus Carex species Carex nigra Name Homonyms Carex nigra subsp. recta (F.Fleisch.) Rothm. Carex nigra var. recta (F.Fleisch) Hyl. Carex nigra f. recta (Fleischm.) J.Kern & Reichg.