Carex nigra Schwein. Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Tracheophyta class Liliopsida order Poales family Cyperaceae genus Carex species Carex nigra Name Homonyms Carex nigra (L.) Reichard Carex nigra Siev. Carex nigra All. Carex nigra Schwein. ex Torr. Carex nigra Schkuhr Carex nigra Schwein. Carex nigra (Linnaeus, 1753) Rchb.