Carex acuta var. nigra L. Dataset GBIF Backbone Taxonomy Rank VARIETY Published in Sp. Pl.: 978 (1753) Classification kingdom Plantae phylum Tracheophyta class Liliopsida order Poales family Cyperaceae genus Carex species Carex nigra Name Homonyms Carex acuta subsp. nigra (L.) Ehrh. Carex acuta var. nigra L.