Cyperaceae

From Wikipedia, the free encyclopedia
Jump to: navigation, search
Sedges
Cyperus polystachyos flower head
Scientific classification
Kingdom: Plantae
Division: Magnoliophyta
Class: Liliopsida
Order: Poales
Family: Cyperaceae
Genera

About 70

Broad-leaved cotton-grass (Eriophorum latifolium)

The family Cyperaceae, or the sedges, is a taxon of flowering plants that superficially resemble grasses or rushes. The family is large, with some 4,000 species described in about 70 genera.

The family is large, with some 5,500 species described in about 109 genera.[1] The largest is the Carex genus of "true sedges", with over 2,000 species.[2][3][4]

These species are widely distributed, with many in tropical Asia and tropical South America. Sedges may be found growing in almost all environments, though many are associated with wetlands, or with poor soils. Ecological communities dominated by sedges are known as sedgelands.

Features distinguishing members of the sedge family from grasses or rushes are stems with triangular cross-sections (with occasional exceptions) and leaves that are spirally arranged in three ranks (grasses have alternate leaves forming two ranks).[5][6][7]

References[change | change source]

  1. Govaerts R. 2007. World Checklist of Cyperaceae: Sedges. Royal Botanic Gardens, Kew. ISBN 978-1-84246-199-0
  2. "Sedge family – definition and more from the free Mirriam-Webster Dictionary". Mirriam-Webster. http://www.merriam-webster.com/dictionary/sedge%20family. Retrieved 25 December 2013.
  3. Milne, Lorus Johnson & Milne, Margery Joan Greene 1975. Living plants of the world. Random House, 301
  4. Hipp, Andrew L. 2007. Nonuniform processes of chromosome evolution in sedges (Carex: Cyperaceae). Evolution 61, 2175–2194. [1]
  5. "Grasslike non-grasses". http://www.backyardnature.net/fl_caryx.htm.
  6. Ball P.W; Reznicek A.A. & Murray D.F. Cyperaceae Jussieu in Magnoliophyta: Commelinidae (in part): Cyperaceae. Flora of North America, vol 23, Oxford University Press. ISBN 978-0-19-515207-4 [2]
  7. Speer, Brian R. 1995. Glumiflorae: more on morphology. University of California, Berkeley [3].