Rhynchospora rugosa, known by the common name of claybank beaksedge, is a member of the sedge family, Cyperaceae. It is a perennial herb, native to Central and South America.
While Plants of the World Online accepts the African Rhynchospora brownii as an extant species, it is considered to be a subspecies of Rhynchospora rugosa by the Global Biodiversity Information Facility.