Schoenoplectus pungens

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Common threesquare
Schoenoplectus pungens FWS-2.jpg
Scientific classification
Kingdom: Plantae
(unranked): Angiosperms
(unranked): Monocots
(unranked): Commelinids
Order: Poales
Family: Cyperaceae
Genus: Schoenoplectus
Species: S. pungens
Binomial name
Schoenoplectus pungens
(Vahl) Palla
  • Scirpus pungens Vahl
  • Heleogiton pungens (Vahl) Rchb. in J.C.Mössler & H.G.L.Reichenbach
  • Scirpus americanus var. pungens (Vahl) Barros & Osten

Schoenoplectus pungens is a species of flowering plant in the sedge family known by the common names common threesquare,[2] common three-square bulrush[3] and sharp club-rush.[4] It is a herbaceous emergent plant that is widespread across much of North and South America as well as Europe, New Zealand and Australia.[1][5][6][7][8][9][10][11]


Schoenoplectus pungens is a long-lived perennial herb up to 1.5 m tall, found in open, sun-lit marshes and along the shores of lakes and ponds, in water up to 1 m deep. It is resistant to fire.[12][13][14][15] The species is closely related to S. americanus, and many S. pungens specimens have long been misidentified as S. americanus.[3]


The foliage is dark green, rough and dense. The flowers are blue. The seeds are brown.[13]


  1. ^ a b Kew World Checklist of Selected Plant Families
  2. ^ "Schoenoplectus pungens". Natural Resources Conservation Service PLANTS Database. USDA. Retrieved 1 February 2016. 
  3. ^ a b Flora of North America
  4. ^ "BSBI List 2007". Botanical Society of Britain and Ireland. Archived from the original (xls) on 2015-02-25. Retrieved 2014-10-17. 
  5. ^ "Family Cyperaceae Schoenoplectus pungens (Vahl) Palla". Wisplants. Retrieved 4 February 2013. 
  6. ^ Jermy, C., Simpson, D., Foley, M. & Porter, M. (2007). Sedges of the British Isles. B.S.B.I. Handbook No. 1 , ed. 3: 1-554. Botanical Society of the British Isles, London.
  7. ^ Govaerts, R. & Simpson, D.A. (2007). World Checklist of Cyperaceae. Sedges: 1-765. The Board of Trustees of the Royal Botanic Gardens, Kew.
  8. ^ Castroviejo, S. & al. (eds.) (2008). Flora Iberica 18: 1-420. Real Jardín Botánico, CSIC, Madrid.
  9. ^ Rothrock, P.E. (2009). Sedges of Indiana and adjacent states: the non-Carex species: 1-271. Indiana Academy of Sciences.
  10. ^ Danylyk, I.M. & Honcharenko, V.I. (2009). Schoenoplectus pungens (Vahl) Palla (Cyperaceae), a new species for of the Ukrainian flora. Ukrayins'k Botanichnyi Zhurnal 66: 650-655.
  11. ^ Acevedo-Rodríguez, P. & Strong, M.T. (2012). Catalogue of seed plants of the West Indies. Smithsonian Contributions to Botany 98: 1-1192.
  12. ^ "Schoenoplectus pungens (Vahl) Palla". CalFlora. Retrieved 4 February 2013. 
  13. ^ a b "Conservation Plant Characteristics". Retrieved 4 February 2013. 
  14. ^ "Schoenoplectus pungens v. pungens (Scirpus pungens, Scirpus americanus)". Native Plant Center. Retrieved 4 January 2013. 
  15. ^ "Scirpus pungens Vahl three square". CalFlora. Retrieved 4 February 2013. 

External links[edit]

Media related to Schoenoplectus pungens at Wikimedia Commons