Threesquare is found in open, sun-lit marshes and along the shores of lakes and ponds, in water up to 1 m (3 ft 3 in) deep. It is resistant to fire.[12][13][14][15]
Description
Schoenoplectus pungens is a long-lived perennial herb up to 1.5 m (4 ft 11 in) tall.[13] The foliage is dark green, rough and dense. The small flowers are grouped in dense spikelets, with of 1–7 spikelets on each stem.[13] The seeds are brown.[13]
It is closely related to S. americanus, and many S. pungens specimens have long been misidentified as S. americanus.[3]
Painting by
Jacob Sturm in Deutschlands Flora in Abbildungen
^USDA, NRCS (n.d.).
"Schoenoplectus pungens". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 1 February 2016.
^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.
^Govaerts, R. & Simpson, D.A. (2007). World Checklist of Cyperaceae. Sedges: 1-765. The Board of Trustees of the Royal Botanic Gardens, Kew.
^Castroviejo, S. & al. (eds.) (2008). Flora Iberica 18: 1-420. Real Jardín Botánico, CSIC, Madrid.
^Rothrock, P.E. (2009). Sedges of Indiana and adjacent states: the non-Carex species: 1-271. Indiana Academy of Sciences.
^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.
^Acevedo-Rodríguez, P. & Strong, M.T. (2012). Catalogue of seed plants of the West Indies. Smithsonian Contributions to Botany 98: 1-1192.