''Rhynchospora rugosa'', known by the common name of claybank beaksedge, is a member of the sedge family,

Cyperaceae The Cyperaceae are a family of graminoid (grass-like), monocotyledonous flowering plants known as sedges. The family is large, with some 5,500 known species described in about 90 genera, the largest being the "true sedges" genus ''Carex'' w ...

. It is a perennial herb, native to

Central Central is an adjective usually referring to being in the center of some place or (mathematical) object. Central may also refer to: Directions and generalised locations * Central Africa, a region in the centre of Africa continent, also known as ...

and South America. While

Plants of the World Online Plants of the World Online (POWO) is an online database published by the Royal Botanic Gardens, Kew. It was launched in March 2017 with the ultimate aim being "to enable users to access information on all the world's known seed-bearing plants by ...

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.

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* * rugosa Flora of Southern America Flora of Central America Flora of the Caribbean Flora of Hawaii Plants described in 1798 Plants described in 1944 {{Cyperaceae-stub Cyperaceae