''Cyperus'' is a large

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial nom ...

of about 700

species In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate s ...

sedge 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'' ...

s, distributed throughout all continents in both tropical and temperate regions.

Description

They are

annual Annual may refer to: *Annual publication, periodical publications appearing regularly once per year ** Yearbook ** Literary annual *Annual plant *Annual report *Annual giving *Annual, Morocco, a settlement in northeastern Morocco *Annuals (band), ...

perennial plant A perennial plant or simply perennial is a plant that lives more than two years. The term ('' per-'' + '' -ennial'', "through the years") is often used to differentiate a plant from shorter-lived annuals and biennials. The term is also wide ...

s, mostly aquatic and growing in still or slow-moving water up to deep. The species vary greatly in size, with small species only tall, while others can reach in height. Common names include ''papyrus sedges'', ''flatsedges'', ''nutsedges'', ''umbrella-sedges'' and ''galingales''. The stems are circular in cross-section in some, triangular in others, usually leafless for most of their length, with the slender

grass Poaceae () or Gramineae () is a large and nearly ubiquitous family of monocotyledonous flowering plants commonly known as grasses. It includes the cereal grasses, bamboos and the grasses of natural grassland and species cultivated in lawns a ...

-like leaves at the base of the plant, and in a

whorl A whorl ( or ) is an individual circle, oval, volution or equivalent in a whorled pattern, which consists of a spiral or multiple concentric objects (including circles, ovals and arcs). Whorls in nature File:Photograph and axial plane floral ...

at the apex of the flowering stems. The

flower A flower, sometimes known as a bloom or blossom, is the reproductive structure found in flowering plants (plants of the division Angiospermae). The biological function of a flower is to facilitate reproduction, usually by providing a mechani ...

s are greenish and

wind-pollinated Anemophily or wind pollination is a form of pollination whereby pollen is distributed by wind. Almost all gymnosperms are anemophilous, as are many plants in the order Poales, including grasses, sedges, and rushes. Other common anemophilous pla ...

; they are produced in clusters among the apical leaves. The

seed A seed is an embryonic plant enclosed in a protective outer covering, along with a food reserve. The formation of the seed is a part of the process of reproduction in seed plants, the spermatophytes, including the gymnosperm and angiospe ...

is a small

nutlet A nut is a fruit consisting of a hard or tough nutshell protecting a kernel which is usually edible. In general usage and in a culinary sense, a wide variety of dry seeds are called nuts, but in a botanical context "nut" implies that the shell ...

Ecology

''Cyperus'' species are eaten by the

larva A larva (; plural larvae ) is a distinct juvenile form many animals undergo before metamorphosis into adults. Animals with indirect development such as insects, amphibians, or cnidarians typically have a larval phase of their life cycle. ...

e of some Lepidoptera species, including ''

Chedra microstigma ''Chedra microstigma'' is a tiny moth of the family Batrachedridae described in 1907. It has only been found on Oahu. It has been found feeding on sedges, plants belonging to the Cyperaceae family, and its larvae host at least three species of pa ...

''. They also provide an alternative food source for ''

Bicyclus anynana ''Bicyclus anynana'' (squinting bush brown) is a small brown butterfly in the family Nymphalidae, the most globally diverse family of butterflies. It is primarily found in eastern Africa from southern Sudan to Eswatini.bird Birds are a group of warm-blooded vertebrates constituting the class Aves (), characterised by feathers, toothless beaked jaws, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and a strong yet lightweig ...

s and mammals. ''

Cyperus microcristatus ''Cyperus microcristatus'' is a species of sedge that is endemic to an area of Cameroon Cameroon (; french: Cameroun, ff, Kamerun), officially the Republic of Cameroon (french: République du Cameroun, links=no), is a country in west-c ...

'' (from

Cameroon Cameroon (; french: Cameroun, ff, Kamerun), officially the Republic of Cameroon (french: République du Cameroun, links=no), is a country in west-central Africa. It is bordered by Nigeria to the west and north; Chad to the northeast; the C ...

) and '' C. multifolius'' (native to

Panama Panama ( , ; es, link=no, Panamá ), officially the Republic of Panama ( es, República de Panamá), is a transcontinental country spanning the southern part of North America and the northern part of South America. It is bordered by Co ...

and

Ecuador Ecuador ( ; ; Quechua: ''Ikwayur''; Shuar: ''Ecuador'' or ''Ekuatur''), officially the Republic of Ecuador ( es, República del Ecuador, which literally translates as "Republic of the Equator"; Quechua: ''Ikwadur Ripuwlika''; Shuar: ' ...

) are possibly extinct; the former was only found once, in 1995, and the latter has not been seen in the last 200 years. The "true" papyrus sedge of Ancient Egypt, ''C. papyrus'' subsp. ''hadidii'', is also very rare today due to draining of its wetland habitat; feared extinct in the mid-20th century, it is still found at a few sites in the

Wadi El Natrun Wadi El Natrun (Arabic: "Valley of Natron"; Coptic: , "measure of the hearts") is a depression in northern Egypt that is located below sea level and below the Nile River level. The valley contains several alkaline lakes, natron-rich salt ...

region and northern Sudan. Some tuber-bearing species on the other hand, most significantly the purple nutsedge, '' C. rotundus'', are considered

invasive weed An invasive species otherwise known as an alien is an introduced organism that becomes overpopulated and harms its new environment. Although most introduced species are neutral or beneficial with respect to other species, invasive species ad ...

s in much of the world.

Diversity

Around 700 species are currently recognised in the genus ''Cyperus''.

Fossil record

Many

fossil A fossil (from Classical Latin , ) is any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells, exoskeletons, stone imprints of animals or microbes, objects preserved ...

fruits of a ''Cyperus'' species have been described from middle Miocene strata of the Fasterholt area near

Silkeborg Silkeborg () is a Danish town with a population of 49,747 (1 January 2022).Jutland Jutland ( da, Jylland ; german: Jütland ; ang, Ēota land ), known anciently as the Cimbric or Cimbrian Peninsula ( la, Cimbricus Chersonesus; da, den Kimbriske Halvø, links=no or ; german: Kimbrische Halbinsel, links=no), is a peninsula of ...

Denmark ) , song = ( en, "King Christian stood by the lofty mast") , song_type = National and royal anthem , image_map = EU-Denmark.svg , map_caption = , subdivision_type = Sovereign state , subdivision_name = Kingdom of Denmark , establish ...

. Several

fruits of †''Cyperus distachyoformis'' have been extracted from

borehole A borehole is a narrow shaft bored in the ground, either vertically or horizontally. A borehole may be constructed for many different purposes, including the extraction of water ( drilled water well and tube well), other liquids (such as petrol ...

samples of the Middle Miocene fresh water deposits in Nowy Sacz Basin,

West Carpathians The Western Carpathians are a mountain range and geomorphological province that forms the western part of the Carpathian Mountains. The mountain belt stretches from the Low Beskids range of the Eastern Carpathians along the border of Poland wit ...

Poland Poland, officially the Republic of Poland, is a country in Central Europe. It is divided into 16 administrative provinces called voivodeships, covering an area of . Poland has a population of over 38 million and is the fifth-most populou ...

Use by humans

Papyrus sedge ('' C. papyrus'') of

Africa Africa is the world's second-largest and second-most populous continent, after Asia in both cases. At about 30.3 million km2 (11.7 million square miles) including adjacent islands, it covers 6% of Earth's total surface area ...

was of major historical importance in providing

papyrus Papyrus ( ) is a material similar to thick paper that was used in ancient times as a writing surface. It was made from the pith of the papyrus plant, '' Cyperus papyrus'', a wetland sedge. ''Papyrus'' (plural: ''papyri'') can also refer to a ...

. '' C. giganteus'', locally known as ''cañita'', is used by the

Yokot'an The Chontal Maya are a Maya people of the Mexican state of Tabasco. "Chontal", from the Nahuatl word for ''chontalli'', which means "foreigner", has been applied to various ethnic groups in Mexico. The Chontal refer to themselves as the Yokot'an ...

Maya Maya may refer to: Civilizations * Maya peoples, of southern Mexico and northern Central America ** Maya civilization, the historical civilization of the Maya peoples ** Maya language, the languages of the Maya peoples * Maya (Ethiopia), a popul ...

Tabasco Tabasco (), officially the Free and Sovereign State of Tabasco ( es, Estado Libre y Soberano de Tabasco), is one of the 32 Federal Entities of Mexico. It is divided into 17 municipalities and its capital city is Villahermosa. It is located in ...

Mexico Mexico (Spanish: México), officially the United Mexican States, is a country in the southern portion of North America. It is bordered to the north by the United States; to the south and west by the Pacific Ocean; to the southeast by Guatema ...

, for weaving ''petates'' (sleeping mats) and

sombrero A sombrero (Spanish , ) is a type of wide-brimmed Mexican men's hat used to shield the face and eyes from the sun. It usually has a high pointed crown, an extra-wide brim (broad enough to cast a shadow over the head, neck and shoulders of the w ...

s. '' C. textilis'' and '' C. pangorei'' are traditionally used to produce the typical mats of

Palakkad Palakkad (), formerly known as Palghat, historically known as Palakkattussery is a city and municipality in the Indian state of Kerala. It is the administrative headquarters of the Palakkad District. Palakkad is most densely populated municipal ...

India India, officially the Republic of India (Hindi: ), is a country in South Asia. It is the seventh-largest country by area, the second-most populous country, and the most populous democracy in the world. Bounded by the Indian Ocean on the so ...

, and the '' makaloa'' mats of

Niihau Niihau ( Hawaiian: ), anglicized as Niihau ( ), is the westernmost main and seventh largest inhabited island in Hawaii. It is southwest of Kauaʻi across the Kaulakahi Channel. Its area is . Several intermittent playa lakes provide wetland ha ...

were made from '' C. laevigatus''. The chufa flatsedge (''C. esculentus'') has edible

tuber Tubers are a type of enlarged structure used as storage organs for nutrients in some plants. They are used for the plant's perennation (survival of the winter or dry months), to provide energy and nutrients for regrowth during the next growin ...

s and is grown commercially for these; they are eaten as vegetables, made into sweets, or used to produce the ''

horchata Horchata (; ), or (), is a name given to various beverages, which are generally plant-based, but sometimes contain animal milk. In Spain, it is made with soaked, ground, and sweetened tiger nuts. In Latin America and other parts of the Americas ...

'' of the

Valencia Valencia ( va, València) is the capital of the autonomous community of Valencia and the third-most populated municipality in Spain, with 791,413 inhabitants. It is also the capital of the province of the same name. The wider urban area al ...

region. Several other species – e.g.

Australian bush onion ''Cyperus bulbosus'' is a species of sedge found across Africa, the Middle East, Indian subcontinent, Southeast Asia, and Australia. In Australia, it is commonly called Nalgoo or (Australian) bush onion or "wild onion", but is not related to the ...

(''C. bulbosus'') – are eaten to a smaller extent. For some Northern Paiutes, ''Cyperus'' tubers were a mainstay food, to the extent that they were known as ''tövusi-dökadö'' ("nutsedge tuber eaters") Priprioca ('' C. articulatus'') is one of the traditional

spice A spice is a seed, fruit, root, bark, or other plant substance primarily used for flavoring or coloring food. Spices are distinguished from herbs, which are the leaves, flowers, or stems of plants used for flavoring or as a garnish. Spice ...

s of the

Amazon Amazon most often refers to: * Amazons, a tribe of female warriors in Greek mythology * Amazon rainforest, a rainforest covering most of the Amazon basin * Amazon River, in South America * Amazon (company), an American multinational technolog ...

region and its reddish essential oil is used commercially both by the cosmetic industry, and increasingly as a

flavoring A flavoring (or flavouring), also known as flavor (or flavour) or flavorant, is a food additive used to improve the taste or smell of food. It changes the perceptual impression of food as determined primarily by the chemoreceptors of the gus ...

for food. Interest is increasing in the larger, fast-growing species as crops for

paper Paper is a thin sheet material produced by mechanically or chemically processing cellulose fibres derived from wood, rags, grasses or other vegetable sources in water, draining the water through fine mesh leaving the fibre evenly distrib ...

and biofuel production. Some species are grown as ornamental or

pot plant Container gardening or pot gardening/farming is the practice of growing plants, including edible plants, exclusively in containers instead of planting them in the ground. A container in gardening is a small, enclosed and usually portable object ...

s, notably: * '' Cyperus alternifolius'' syn. ''C. involucratus'' (umbrella papyrus) *''

Cyperus albostriatus ''Cyperus albostriatus'' is a species of sedge that is native to southern parts of Africa Africa is the world's second-largest and second-most populous continent, after Asia in both cases. At about 30.3 million km2 (11.7 mill ...

'' (dwarf umbrella sedge), formerly called ''C. diffusus'') *'' Cyperus haspan'' *''

Cyperus longus ''Cyperus longus'' is a species of sedge known by the common names of sweet cyperus and water rush in Africa, or in Britain galingale (a variant name of galangal, an unrelated plant). It is a tall plant, growing up to in height, with creeping r ...

'' *'' Cyperus papyrus'' (papyrus) Some ''Cyperus'' species are used in

folk medicine Traditional medicine (also known as indigenous medicine or folk medicine) comprises medical aspects of traditional knowledge that developed over generations within the folk beliefs of various societies, including indigenous peoples, before the ...

. Roots of Near East species were a component of ''

kyphi Kyphi, cyphi, or Egyptian cyphi is a compound incense that was used in ancient Egypt for religious and medical purposes. Word Kyphi ( la, cyphi) is romanized from Greek κυ̑φι for Ancient Egyptian "kap-t", incense, from "kap", to perfume ...

'', a medical

incense Incense is aromatic biotic material that releases fragrant smoke when burnt. The term is used for either the material or the aroma. Incense is used for aesthetic reasons, religious worship, aromatherapy, meditation, and ceremony. It may also b ...

of Ancient Egypt. Tubers of '' C. rotundus'' (purple nut-sedge) tubers are used in ''

kampō , often known simply as , is the study of traditional Chinese medicine in Japan following its introduction, beginning in the 7th century. It was adapted and modified to suit Japanese culture and traditions. Traditional Japanese medicine use ...

''. An unspecified ''Cyperus'' is mentioned as an abortifacient in the 11th-century poem '.

References

External links

CYPERUS interactive identification key by D. M. Ferguson @ LSU Herbarium

CYPERACEAE interactive identification keys @ LSU Herbarium

Flora of China Vol. 23 Page 219, 莎草属 suo cao shu, ''Cyperus'' Linnaeus, Sp. Pl. 1: 44. 1753.

Flora of Pakistan, V. 206 Page 89, ''Cyperus'' Linnaeus, Sp. Pl. 1: 44. 1753; Gen. Pl., ed. 5: 26. 1754; Boiss., Fl. Or. 5: 363. 1882; C.B.Clarke in Hook.f., Fl. Brit. Ind. 6: 597. 1893; R. R. Stewart, l.c. 86. 1972; ''Kukkonen'' in Rech.f., Fl. Iranica 173: 85. 1998.Cords and a fishnet from Cyperus & Scirpus
{{Taxonbar, from=Q161224 Freshwater plants Cyperaceae genera