Cyperus L.
  • Sp. Pl. 1: 44. 1753. (1 May 1753)
  • Umbrella-sedge, flatsedge [Greek kupeiros, name for Eurasian Cyperus longus Linnaeus]


Cite taxon page as 'WFO (2020): Cyperus L. Published on the Internet;http://www.worldfloraonline.org/taxon/wfo-4000010449. Accessed on: 18 Feb 2020'

General Information

5. Cyperus L.

Por C.D. Adams.

Perennes o anuales pequeñas a grandes, con o sin rizomas, raramente estoloníferas. Tallos usualmente cespitosos, trígonos o menos frecuentemente teretes. Hojas envainando al tallo en la base, algunas veces sin láminas, generalmente escabriúsculas con setulas antrorsas en los márgenes y la costilla media en el envés. Inflorescencia determinada, desde una cabezuela simple sésil hasta una panícula decompuesta umbeliforme; brácteas foliiformes en el extremo superior del tallo escapífero. Espiguillas bisexuales (unisexuales en C. canus) comprimidas o subteretes, en espigas o digitadas en los extremos de los rayos o rayuelos, pauci- o multifloras. Glumas dísticas, alternando en una raquilla recta o flexuosa, alada o no alada, 3- o más nervias, 1- o 2-carinadas, persistentes o caducas; raquilla persistente o decidua distal a un profilo adaxial y una bractéola abaxial. Flores bisexuales (excepto en la dioica C. canus); perianto ausente; estambres 1-3; estigmas 3 (2 en C. laevigatus). Aquenios trígonos o más o menos comprimidos dorsiventralmente, raramente subteretes, a menudo apiculados pero no rostrados, la superficie usualmente punticulada, a veces lisa, raramente granular. Aprox. 550 spp. Cosmopolita.

Bibliografía: Denton, M.F. Contr. Univ. Michigan. Herb. 11: 197-271 (1978). Kükenthal, G. en Engler, A. Pflanzenr. IV. 20 (Heft 101): 41-160, 161-315 (1935-1936); 402-466 (1936b). Tucker, G.C. Syst. Bot. Monogr. 2: 1-85 (1983).

  • Provided by: [E].Flora Mesoamericana
    • Source: [
    • 5
    • 1
    • ]. 

    CYPERUS L.

    Por Gordon C. Tucker

    Herbáceas en matas o rizomatosas, perennes o anuales; culmos triquetros o redondeados; plantas hermafroditas o muy rara vez dioicas (C. canus). Hojas sólo basales (sin lámina en varias especies). Brácteas de la inflorescencia sin lámina, agrupadas en la parte superior del culmo, cada una sosteniendo un rayo (pedúnculo), espiguillas cilíndricas o comprimidas, naciendo espigada o digitadamente en los extremos de los rayos o de sus ramas, flores en las axilas de escamas dísticas, cuyas bases frecuentemente son decurrentes sobre la raquilla en forma de alas hialinas; perianto ausente; estambres (1–) 3; estilos 2- ó 3-ramificados. Fruto triquetro o lenticular.

    Género pantropical y templado con ca 600 especies; 53 especies se han colectado en Nicaragua y 5 más se esperan encontrar.

    G.C. Tucker. Taxonomy of Cyperus (Cyperaceae) in Costa Rica and Panama. Syst. Bot. Monogr. 2: 1–85. 1983; G.C. Tucker. Revision of the Mexican species of Cyperus (Cyperaceae). Syst. Bot. Monogr. 43: 1–213. 1994.

  • Provided by: [C].Flora de Nicaragua
    • Source: [
    • 6
    • ]. 

    Herbs, annual or perennial, with rhizomes or stolons. Culms caespitose or solitary, erect, usually 3-angled or acutely triquetrous, sometimes compressed triquetrous, stout or slender, leafy at basal part or at base. Leaves basal, 3-ranked, rarely without a blade; ligule absent. Involucral bracts leaflike, usually 2-10(-20 or more), at base of inflorescence. Inflorescences terminal, a simple or compound anthela, with several to many rays and usually with raylets (secondary rays); rays and raylets unequal or rarely equal in length or inflorescence capitate. Spikelets few to many in spikes, digitate clusters, or a capitulum at apex of rays, rarely single; rachilla not articulate at base, persistent, usually with narrow wings. Glumes distichous, rarely spirally imbricate; basal 1 or 2 glumes without a flower; remaining glumes each with a bisexual flower. Perianth bristles or scales absent. Stamens (1-)3. Style base not swollen; stigmas (2 or)3, deciduous at maturity. Nutlet 3-sided, smooth, puncticulate, tuberculate, or rarely reticulately striate.

  • Provided by: [F].Flora Of CHina @ efloras.org
    • Source: [
    • 9
    • ]. 

    Herbs, perennial or less often annual, cespitose or not, rhizomatous, stoloniferous, rarely tuberous. Culms solitary or not, trigonous or round, glabrous or scabridulous with extrorse or antrorse (rarely retrorse) prickles. Leaves usually basal; ligules absent; blades keeled abaxially, flat, V-, or inversely W-shaped in cross section. Inflorescences terminal, rarely pseudolateral, 1st order subumbellate to capitate, 2d order with spicate or digitately arranged spikelets, rarely a solitary spikelet; spikelets 1–150; 1st order rays unequal (rarely equal) in length, produced singly from the axils of inflorescence bracts; involucral bracts 1–22, spirally arranged at culm apex, spreading to erect, leaflike. Spikelets: scales to 76, distichous, each subtending flower, cylindric to compressed, borne spicately or digitately at ends of rays (occasionally proliferous). Flowers bisexual [rarely unisexual], in axils of distichous floral scales, bases often decurrent onto rachilla as ± hyaline wings; perianth absent; stamens 1–3; styles linear, 2–3-fid, base deciduous or persistent; stigmas 2–3. Achenes biconvex, flattened, or trigonous.

  • Provided by: [D].Flora of North America @ efloras.org
    • Source: [
    • 10
    • ]. 

    Annuals or perennials, the culms simple, usually triangular and leafy; inflores- cence involucrate in dense spikes or in clusters, capitate or on rays which are often compound; spikelets flat or subterete, few- or many-flowered, the rachis often winged, the scales concave, 2-ranked; flowers perfect; perianth none; stamens 1-3; style 2- to 3-cleft; achene lenticular or 3-angulate.

  • Provided by: [I].Flora de Panama
    • Source: [
    • 11
    • 7
    • ]. 

    Plantas anuales o perennes, pequeñas o grandes, con o sin rizomas; culmos trígonos, rara vez cilíndricos.Hojas con o sin lámina. Infl. determinada, desde una cabezuela hasta una panícula decompuesta, umbeliforme;brácteas foliiformes. Espiguillas bisexuales (unisexuales en C. canus), comprimidas o lineares a subcilíndricas,en espigas o digitadas, con pocas o muchas fls.; glumas dísticas, alternas, 3 ó más nervadas, 1 ó 2-carinadas,persistentes o caducas; raquilla recta o flexuosa, alada o no, persistente o decidua, que a veces se rompe en segmentos de 1 entrenudo con 1 gluma y 1 aquenio. Fls. bisexuales o rara vez (C. canus) unisexuales, sin pe-rianto; estambres 1–3; estigmas 2 ó 3. Frs. (aquenios) trígonos o comprimidos dorsiventral o lateralmente, aveces apiculados, pero no rostrados, la superficie desde lisa hasta punticulada.

  • Provided by: [H].Manual de Plantas de Costa Rica
    • Source: [
    • 12
    • 8
    • ]. 

    "Scales distichous, the lowermost one empty and ± modified; fls perfect, each in the axil of a scale; perianth wanting; stamens 3, less often 1 or 2; style 2–3- cleft, the beakless (or nearly beakless) achene accordingly lenticular or ± trigonous; spikelets few–many in dense or loose spikes or heads, each subtended by 2 small bracts; spikes or heads commonly in a simple or compound terminal umbel that is subtended by sheathless, leafy invol bracts; each ray of the umbel surrounded at base by a tubular prophyll; herbs with solid, ± triangular stems, the lvs with closed sheath and usually an elongate, grasslike blade. 600+, cosmop. Our spp. belong to 5 subgenera, as in the following key. Spp. 14–22 and 23–28 appear to be intergradient, presumably reflecting extensive hybridization."

  • Provided by: [G].New York Botanical Garden
    • Source: [
    • 13
    • ]. 

    Literature

    SELECTED REFERENCES

    Carter, J. R. 1984. A Systematic Study of the New World Species of Section Umbellati of Cyperus. Ph.D. dissertation. Vanderbilt University. Corcoran, M. L. 1941. A revision of the subgenus Pycreus in North and South America. Catholic Univ. Amer., Biol. Ser. 37: 1–68. Denton, M. F. 1978b. The Luzulae group of Cyperus (Cyperaceae). Contr. Univ. Michigan Herb. 11: 197–271. Horvat, M. L. 1941. A revision of the subgenus Mariscus found in the United States. Catholic Univ. Amer., Biol. Ser. 33: 1–147. Marcks, B. G. 1972. Population Studies of North American Cyperus Section Laxiglumi (Cyperaceae). Ph.D. dissertation. University of Wisconsin. Marcks, B. G. 1974. Preliminary reports on the flora of Wisconsin, no. 66. Cyperaceae II—Sedge family II. The genus Cyperus—the umbrella sedges. Trans. Wisconsin Acad. Sci. 62: 261–284. McGivney, M. V. 1938. A revision of the subgenus Eucyperus found in the United States. Catholic Univ. Amer., Biol. Ser. 26: 1–74. Tucker, G. C. 1983. The taxonomy of Cyperus (Cyperaceae) in Costa Rica and Panama. Syst. Bot. Mongr. 2: 1–85. Tucker, G. C. 1994. A revision of the Mexican species of Cyperus L. (Cyperaceae). Syst. Bot. Monogr. 43: 1–214. Tucker, G. C. and R. McVaugh. 1993. Cyperus. In: R. McVaugh and W. R. Anderson, eds. 1974+. Flora Novo-Galiciana: A Descriptive Account of the Vascular Plants of Western Mexico. 8+ vols. Ann Arbor. Vol. 3, pp. 270–344.

  • Provided by: [D].Flora of North America @ efloras.org
    • Source: [
    • 10
    • ]. 

    Included Species

    Other Local Names

    NameLanguageCountry
    Umbrella-sedge, flatsedge [Greek kupeiros, name for Eurasian Cyperus longus Linnaeus]

      Bibliography

     Information From

    Cyperaceae
    • A CC0 1.0 Universal (CC0 1.0).
    MBG Floras Images
    http://www.tropicos.org/ImageSearch.aspx
    Flora images. Missouri Botanical Garden. Accessed on Jun. 2018.
    • B Missouri Botanical Garden
    Flora de Nicaragua
    http://www.tropicos.org/projectwebportal.aspx?projectid=7&pagename=Home&langid=66
    WD Stevens, CU Ulloa, A Pool and OM Montiel. Missouri Botanical Garden Press, 2001
    • C Missouri Botanical Garden
    Flora of North America @ efloras.org
    http://www.efloras.org/flora_page.aspx?flora_id=1
    'Flora of North America @ eFloras (2008). Published on the Internet http://www.efloras.org/flora_page.aspx?flora_id=1 [accessed August 2016]' Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
    • D Flora of North America Association
    Flora Mesoamericana
    http://www.mobot.org/MOBOT/fm/
    Gerrit Davidse, Mario Sousa Sánchez, A. O. Chater, Universidad Nacional Autónoma de México. Instituto de Biología, Missouri Botanical Garden, Natural History Museum (London, England) UNAM, 1994
    • E Missouri Botanical Garden
    Flora Of CHina @ efloras.org
    http://www.efloras.org/flora_page.aspx?flora_id=2
    'Flora of China @ eFloras (2008). Published on the Internet http://www.efloras.org/flora_page.aspx?flora_id=2 [accessed August 2016]' Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
    • F Missouri Botanical Garden
    New York Botanical Garden
    Descriptions of plants should be attributed to the full citation for each individual article, chapter or book that is the source for each record, which should include the authors of original publication.
    • G Content licensed under Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License
    Manual de Plantas de Costa Rica
    http://www.tropicos.org/Project/Costa%20Rica
    Hammel, B. E.; Grayum, M. H.; Herrera, C.; Zamora, N. Manual de Plantas de Costa Rica. Missouri Botanical Garden Press, 2003-2014
    • H Missouri Botanical Garden
    Flora de Panama
    http://www.tropicos.org/Project/PAC
    Robert E. Woodson, Jr. and Robert W. Schery Annals of the Missouri Botanical Garden Vol. 67, No. 4 (1980), pp. ii-xxxiii
    • I Missouri Botanical Garden
    World Flora Online consortium
    http://www.worldfloraonline.org/organisation/WFO
    World Flora Online Data. 2018.
    • J CC0 1.0 Universal (CC0 1.0).