Cyperus difformis

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Cyperus difformis
Starr 030807-9003 Cyperus difformis.jpg
Cyperus difformis P6100117.jpg
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Clade: Commelinids
Order: Poales
Family: Cyperaceae
Genus: Cyperus
Species:
C. difformis
Binomial name
Cyperus difformis
L.
Cyperus difformisDistW.png
Occurrence data from GBIF
Synonyms [1]
  • Cyperus lateriflorusTorr. 1859, illegitimate homonym, not Steud. 1829
  • Cyperus protractusLink 1821, illegitimate homonym, not Delile 1813
  • Cyperus viridisWilld. ex Kunth 1837, illegitimate homonym, not Krock. 1787 nor Sieber ex C. Presl 1828 nor Roxb. ex C.B. Clarke 1884
  • Cyperus holoschoenoidesJan ex Schult.
  • Cyperus subrotundusLlanos
  • Cyperus goeringiiSteud.
  • Cyperus oryzetorumSteud.

Cyperus difformis is a species of sedge known by several common names, including variable flatsedge, [2] smallflower umbrella-sedge and rice sedge. [3] This plant is native to southern Europe, most of Africa and Asia, and Australia, and it is naturalized in other areas of the world, including large parts of the Americas. [1] [4] [5] [6] [7] [8] [9] [10] [11] [12]

Contents

Cyperus difformis is a plant of aquatic and moist habitats. It is a weed of rice fields, but not generally a troublesome one. This is an annual herb with one to many thin, soft erect stems reaching over 30 centimeters in maximum height. There are usually a few long, wispy leaves around the base of the plant. The inflorescence is a rounded bundle one to three centimeters wide, containing up to 120 spikelets, each long and partially or entirely covered in up to 30 bracted flowers. The flowers are light brown with areas darker brown and sometimes a yellowish or purplish tint. [13] [14]

Similar Species

C. difformis can be distinguished from most visually similar species by the small size of the glumes, 0.5-0.7 x 0.5 mm, resembling tiny slightly elongated blunt beads. [15]

Related Research Articles

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<i>Cyperus eragrostis</i> Species of plant

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<i>Cyperus fuscus</i> Species of plant

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Cyperus niger is a species of sedge known by the common name black flatsedge. This plant is native to the Americas, where it can be found in wet areas from South and Central America to the southwestern United States, from California and Oklahoma south to Argentina.

<i>Cyperus odoratus</i> Species of plant

Cyperus odoratus is a species of sedge known by the common names fragrant flatsedge and rusty flatsedge. This species is quite variable and may in fact be more than one species included under one name.

<i>Cyperus squarrosus</i> Species of sedge

Cyperus squarrosus is a species of sedge known by several common names, including bearded flatsedge and awned flatsedge. It is found in wet environments in North and South America, Africa, Australia, southern Asia and Italy.

<i>Eleocharis quinqueflora</i> Species of grass-like plant

Eleocharis quinqueflora is a species of spikesedge known by the common names fewflower spikerush and few-flowered spike-rush. It is widespread across Europe, North Africa, northern Asia, and North America. There are also isolated populations in Argentina and Chile.

<i>Kyllinga</i> Genus of grass-like plants

Kyllinga is genus of flowering plants in the sedge family known commonly as spikesedges. They are native to tropical and warm temperate areas of the world, especially tropical Africa. These sedges vary in morphology, growing to heights from 2.5 centimeters to a meter and sometimes lacking rhizomes. They are closely related to Cyperus species and sometimes treated as part of a more broadly circumscribed Cyperus.

<i>Ocimum americanum</i> Species of flowering plant

Ocimum americanum, known as American basil, lime basil, or hoary basil, is a species of annual herb in the family Lamiaceae. Despite the misleading name, it is native to Africa, the Indian Subcontinent, China, and Southeast Asia. The species is naturalized in Queensland, Christmas Island, and parts of tropical America.

<i>Bidens laevis</i> Species of flowering plant

Bidens laevis is a species of flowering plant in the daisy family known by the common names larger bur-marigold and smooth beggarticks. It is native to South America, Mexico, and the southern and eastern United States. It grows in wetlands, including estuaries and riverbanks.

<i>Cyperus laevigatus</i> Species of plant

Cyperus laevigatus is a species of sedge known by the common name smooth flatsedge.

<i>Schoenoplectus pungens</i> Species of grass-like plant

Schoenoplectus pungens is a species of flowering plant in the sedge family known as common threesquare, common three-square bulrush and sharp club-rush. It is a herbaceous emergent plant that is widespread across much of North and South America as well as Europe, New Zealand and Australia.

<i>Clerodendrum speciosissimum</i> Species of flowering plant

Clerodendrum speciosissimum is a tropical shrub of the family Lamiaceae, native to Indonesia and Papuasia, but now naturalized in parts of Latin America, Africa, the Caribbean, Seychelles, and Florida.

Vossia is a monotypic genus in the grass family, found in Asia and Africa. The only known species is Vossia cuspidata, an aquatic grass native to Africa, and to Assam, Bangladesh, and northern Indochina. The common name is hippo grass.

<i>Dioscorea pentaphylla</i> Species of herbaceous vine

Dioscorea pentaphylla is a species of flowering plant in the yam family known by the common name fiveleaf yam. It is native to southern and eastern Asia as well as New Guinea and northern Australia. It is widely cultivated as a food crop and naturalized in Cuba and on several island chains in the Pacific.

<i>Hoslundia</i> Genus of flowering plants

Hoslundia is a genus of flowering plant in the family Lamiaceae, first described in 1804. It contains only one known species, Hoslundia opposita. It is widespread across much of sub-Saharan Africa including Madagascar.

Dictyophleba is a genus of flowering plants in the family Apocynaceae first described as a genus in 1898. It is native to Africa and to the Comoros Islands in the Indian Ocean.

  1. Dictyophleba leonensis(Stapf) Pichon - West Africa from Cameroon to Liberia
  2. Dictyophleba lucida(K.Schum.) Pierre - Comoros, central + southern Africa from Nigeria east to Tanzania and south to Zimbabwe
  3. Dictyophleba ochracea(K.Schum. ex Hallier f.) Pichon - central Africa from Nigeria to Zaire
  4. Dictyophleba rudensHepper - Cameroon
  5. Dictyophleba setosaB.de Hoogh - Cameroon, Gabon
  6. Dictyophleba stipulosa(S.Moore ex Wernham) Pichon - from Ivory Coast to Congo-Brazzaville

References

  1. 1 2 Kew World Checklist of Selected Plant Families
  2. USDA, NRCS (n.d.). "Cyperus difformis". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 17 January 2016.
  3. "Cyperus difformis". FloraBase . Western Australian Government Department of Biodiversity, Conservation and Attractions.
  4. Altervista Flora Italiana, Zigolo delle risaie, Cyperus difformis L. includes photos plus range maps for Europe and North America
  5. Miller, A.G. & Morris, M. (2004). Ethnoflora of Soqotra Archipelago: 1-759. The Royal Botanic Garden, Edinburgh.
  6. Sita, P. & Moutsambote, J.-M. (2005). Catalogue des plantes vasculaires du Congo , ed. sept. 2005: 1-158. ORSTOM, Centre de Brazzaville.
  7. Acevedo-Rodríguez, P. & Strong, M.T. (2005). Monocotyledons and Gymnosperms of Puerto Rico and the Virgin Islands. Contributions from the United States National Herbarium 52: 1-415.
  8. Tanaka, N., Koyama, T. & Murata, J. (2005). The flowering plants of Mt. Popa, central Myanmar - Results of Myanmar-Japanese joint expeditions, 2000-2004. Makinoa 5: 1-102.
  9. Sosef, M.S.M. & al. (2006). Check-list des plantes vasculaires du Gabon. Scripta Botanica Belgica 35: 1-438.
  10. Figueiredo, E. & Smith, G.F. (2008). Plants of Angola. Strelitzia 22: 1-279. National Botanical Institute, Pretoria
  11. Hoenselaar, K., Verdcourt, B. & Beentje, H. (2010). Cyperaceae. Flora of Tropical East Africa: 1-466.
  12. Figueiredo, E., Paiva, J., Stévart, T., Oliveira, F. & Smith, G.F. (2011). Annotated catalogue of the flowering plants of São Tomé and Príncipe. Bothalia 41: 41-82.
  13. Flora of China, Vol. 23 Page 226, 异型莎草 yi xing suo cao, Cyperus difformis Linnaeus, Cent. Pl. 2: 6. 1756.
  14. Flora of North America, Vol. 23 Page 156, Cyperus difformis Linnaeus, Cent. Pl. II. 6. 1756.
  15. Tutin. Flora Europaea.