''Schoenoplectus pungens'' is a species of flowering plant in the sedge family known as common threesquare, common three-square bulrushFlora of North America
/ref> and sharp club-rush. It is a herbaceous emergent plant that is widespread across much of

North North is one of the four compass points or cardinal directions. It is the opposite of south and is perpendicular to east and west. ''North'' is a noun, adjective, or adverb indicating direction or geography. Etymology The word ''north ...

and

South America South America is a continent entirely in the Western Hemisphere and mostly in the Southern Hemisphere, with a relatively small portion in the Northern Hemisphere at the northern tip of the continent. It can also be described as the sout ...

as well as

Europe Europe is a large peninsula conventionally considered a continent in its own right because of its great physical size and the weight of its history and traditions. Europe is also considered a subcontinent of Eurasia and it is located entirel ...

New Zealand New Zealand ( mi, Aotearoa ) is an island country in the southwestern Pacific Ocean. It consists of two main landmasses—the North Island () and the South Island ()—and over 700 smaller islands. It is the sixth-largest island count ...

and Australia.Kew World Checklist of Selected Plant Families
/ref>Acevedo-Rodríguez, P. & Strong, M.T. (2012). Catalogue of seed plants of the West Indies. Smithsonian Contributions to Botany 98: 1-1192.

Habitat

Threesquare is found in open, sun-lit marshes and along the shores of lakes and ponds, in water up to deep. It is resistant to fire.

Description

''Schoenoplectus pungens'' is a long-lived perennial herb up to tall. The foliage is dark green, rough and dense. The small flowers are grouped in dense spikelets, with of 1–7 spikelets on each stem. The seeds are brown. It is closely related to ''S. americanus,'' and many ''S. pungens'' specimens have long been misidentified as ''S. americanus.'' File:Schoenoplectus spp Sturm11.jpg, Painting by

Jacob Sturm Jacob Sturm (21 March 1771 – 28 November 1848) was a leading engraver of entomological and botanical scientific publications in Germany at the end of the 18th and beginning of the 19th century. He was born and lived in Nuremberg and was th ...

in ''Deutschlands Flora in Abbildungen'' File:Schoenoplectus pungens - Botanical Garden, University of Frankfurt - DSC02704.JPG, At the Botanical Garden of Goethe University Frankfurt File:Schoenoplectus pungens - Flickr - Kevin Thiele.jpg

References

External links

Jepson Manual TreatmentWashington Burke MuseumPhoto gallery
{{Taxonbar, from=Q3475920 pungens Flora of North America Flora of South America Flora of Europe Flora of Australia Plants described in 1805 Freshwater plants