''Costularia'' is a plant genus in the 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 ...

.Kew World Checklist of Selected Plant Families
/ref>Strugnell, A.M. (2006). A checklist of the Spermatophytes of Mt. Mulanje, Malawi. Scripta Botanica Belgica 34: 1-199. It includes 15 species native to southeastern Africa, ranging from South Africa (

KwaZulu-Natal KwaZulu-Natal (, also referred to as KZN and known as "the garden province") is a province of South Africa that was created in 1994 when the Zulu bantustan of KwaZulu ("Place of the Zulu" in Zulu) and Natal Province were merged. It is locate ...

and Northern Provinces) through Eswatini, Mozambique, Zimbabwe, and Malawi, and to the islands

Madagascar Madagascar (; mg, Madagasikara, ), officially the Republic of Madagascar ( mg, Repoblikan'i Madagasikara, links=no, ; french: République de Madagascar), is an island country in the Indian Ocean, approximately off the coast of East Africa ...

Réunion Réunion (; french: La Réunion, ; previously ''Île Bourbon''; rcf, label= Reunionese Creole, La Rényon) is an island in the Indian Ocean that is an overseas department and region of France. It is located approximately east of the island ...

, and the

Seychelles Seychelles (, ; ), officially the Republic of Seychelles (french: link=no, République des Seychelles; Creole: ''La Repiblik Sesel''), is an archipelagic state consisting of 115 islands in the Indian Ocean. Its capital and largest city, V ...

in the Western Indian Ocean.Larridon I, Rabarivola L, Xanthos M, Muasya AM. 2019. Revision of the Afro-Madagascan genus Costularia (Schoeneae, Cyperaceae): infrageneric relationships and species delimitation. ''PeerJ'' 7:e6528 https://doi.org/10.7717/peerj.6528 The genus was formerly circumscribed to include 25 species. A molecular phylogenetic study found that circumscription to include four distinct lineages: # ''Costularia s.s.'' (11 species) from Africa,

, the

Mascarene Islands The Mascarene Islands (, ) or Mascarenes or Mascarenhas Archipelago is a group of islands in the Indian Ocean east of Madagascar consisting of the islands belonging to the Republic of Mauritius as well as the French department of Réunion. Thei ...

and

. # '' Chamaedendron'' (five species) from

New Caledonia ) , anthem = "" , image_map = New Caledonia on the globe (small islands magnified) (Polynesia centered).svg , map_alt = Location of New Caledonia , map_caption = Location of New Caledonia , mapsize = 290px , subdivision_type = Sovereign st ...

. # a group largely conforming to subgenus ''Lophoschoenus'' (eight species) from New Caledonia and

Malesia Malesia is a biogeographical region straddling the Equator and the boundaries of the Indomalayan and Australasian realms, and also a phytogeographical floristic region in the Paleotropical Kingdom. It has been given different definitions. The ...

that are now considered to be part of a redelimited genus ''

Tetraria ''Tetraria'' is a genus of flowering plants in the sedge family, Cyperaceae, native to Tanzania, South Africa, Borneo, Australia and New Zealand. The type species is '' Tetraria compar'' (L.) P.Beauv. Recent molecular work has shown that ''Tetr ...

''. # the species '' Xyroschoenus hornei'', which is endemic to the Seychelles. In 2019, the genus was revised to include 15 species, generally corresponding to ''Costularia s.s.'' and including a few previously undescribed species.

List of species

15 species are accepted: *'' Costularia andringitrensis'' Larridon *'' Costularia brevifolia'' Cherm. *'' Costularia cadetii'' Larridon *'' Costularia humbertii'' Bosser *'' Costularia itremoensis'' *'' Costularia laxa'' Cherm. *'' Costularia leucocarpa'' (

Ridl. Henry Nicholas Ridley CMG (1911), MA (Oxon), FRS, FLS, F.R.H.S. (10 December 1855 – 24 October 1956) was an English botanist, geologist and naturalist who lived much of his life in Singapore. He was instrumental in promoting rubber trees ...

) Pfeiff. *'' Costularia melicoides'' (

Poir. Jean Louis Marie Poiret (11 June 1755 in Saint-Quentin7 April 1834 in Paris) was a French clergyman, botanist, and explorer. From 1785 to 1786, he was sent by Louis XVI to Algeria to study the flora. After the French Revolution, he became a ...

)

C.B.Clarke Charles Baron Clarke (17 June 1832 – 25 August 1906) was a British botanist. He was born at Andover, the eldest son of Turner Poulter Clarke. He was educated at King's College School, London, and at Trinity and Queens' Colleges, Cambridge. He ...

*'' Costularia melleri'' (

Baker A baker is a tradesperson who bakes and sometimes sells breads and other products made of flour by using an oven or other concentrated heat source. The place where a baker works is called a bakery. History Ancient history Since grains ha ...

)

*'' Costularia microcarpa'' ( Cherm.) Kük. *'' Costularia natalensis'' C.B.Clarke *'' Costularia pantopoda'' (

)

*'' Costularia purpurea'' Cherm. *'' Costularia robusta'' (Cherm.) Larridon *'' Costularia xipholepis'' (Baker) Henriette & Senterre

Formerly placed here

'' Xyroschoenus hornei'' (as ''Costularia hornei'' (

) Kük.)

References

Cyperaceae Cyperaceae genera Afrotropical realm flora Taxa named by Charles Baron Clarke {{Cyperaceae-stub