Synonyms: Baeothryon tenuiculum; Chaetocyperus tenuiculus; Chlorocharis balansaeana; Chlorocharis balansana; Eleocharis balansaeana; Eleocharis balansana; Eleocharis calyptrata; Eleocharis costaricensis; Eleocharis elassocarpa; Eleocharis filiculmis var. douradae; Eleocharis pachyrhyncha; Eleocharis piauhiensis; Eleocharis punctata (heterotypic); Eleocharis purpureovaginata; Eleocharis rothiana; Eleocharis rothiana var. nuda; Eleocharis rothiana var. rothiana; Eleocharis stylosa; Eleocharis sulcata; Eleocharis sulcata var. filiculmis; Fimbristylis sulcata; Limnochloa calyptrata; Scirpidium piauhiense; Scirpidium sulcatum; Scirpidium sulcatum var. lituratum; Scirpus filiculmis; Scirpus sulcatus (heterotypic); Scirpus tenuiculus