Synonyms: Calyptrocarya fragifera; Cephaloschoenus oligocephalus; Cephaloschoenus polycephalus; Cephaloschoenus tenuirostris; Dichromena cyperoides; Ephippiorhynchium polycephalum (homotypic); Ephippiorhynchium tenuirostre; Mariscus pilulifer; Mariscus piluliferus; Rhynchospora arechavaletae; Rhynchospora arechavaletae f. pleiocephala; Rhynchospora arechavaletae var. ostenii; Rhynchospora cyperoides; Rhynchospora cyperoides var. longifructus; Rhynchospora cyperoides var. triquetrifolia; Rhynchospora dolichostyla; Rhynchospora globulifera; Rhynchospora mauritii; Rhynchospora ostenii; Rhynchospora polycephala (heterotypic); Rhynchospora riedeliana (heterotypic); Rhynchospora schoenoides (heterotypic); Rhynchospora sparganioides (heterotypic); Rhynchospora sparganoides; Rhynchospora sphaerocephala; Rhynchospora tenuirostris; Rhynchospora triceps (heterotypic); Rhynchospora urvillei; Schoenus cyperinus; Schoenus cyperoides (heterotypic); Schoenus fragifer; Schoenus fragiferus; Schoenus globulifer (homotypic); Schoenus globuliferus (homotypic); Schoenus holoschoenoides (homotypic); Schoenus polycephalus; Schoenus sparganioides (homotypic); Schoenus sparganoides (homotypic); Schoenus triceps; Scirpus muricatus