Carex canescens var. persoonii (Sieber ex W.D.J. Koch) Christ nom. illeg.
Carex canescens var. persoonii (Sieber ex W.D.J. Koch) Christ nom. illeg. is a synonym sensu FNA Ed. Comm., 2002a of:
Carex brunnescens (Persoon) Poiret subsp. brunnescens, an accepted subspecies name sensu FNA Ed. Comm., 2002a.