Cyperaceae taxon details
Carex polymorpha Muhl.
1678005 (urn:lsid:marinespecies.org:taxname:1678005)
accepted
Species
Carex halseyana Dewey · unaccepted
Carex halseyi Eaton · unaccepted
Carex striata Torr. ex Boott · unaccepted
Loxotrema halseyana (Dewey) Raf. · unaccepted
- Variety Carex polymorpha var. californica (L.H.Bailey) Kük. accepted as Carex californica L.H.Bailey
terrestrial
Muhlenberg, G. H. E. (1817). Descriptio Uberior Graminum et Plantarum Calamariarum Americae Septentrionalis Indigenarum et Cicurum. , available online at https://www.biodiversitylibrary.org/page/15348621#page/7/mode/1up
page(s): 239 [details]
page(s): 239 [details]
Description Plants colonial, long-rhizomatous. Culms 30–60 cm, scabrous to smooth distally. Leaves: proximal sheaths fibrillose,...
Description Plants colonial, long-rhizomatous. Culms 30–60 cm, scabrous to smooth distally. Leaves: proximal sheaths fibrillose, bladeless, brown- to reddish purple tinged, 2–4.5 mm diam.; ligules 2–10 mm, longer than wide; largest blades green, flat, 4–45 cm × 2.5–6 mm. Inflorescences 6–19 cm, 1.4–2.2 times longer than proximal bract; proximal bracts 2–9 cm; sheath 0.6–2 cm, blade 1.5–7 cm; proximal spikes pistillate or androgynous; lateral spikes cylindric, 1.5–3.5 cm × 7.5–11 mm; terminal 1–3 spikes, staminate. Pistillate scales purple or brown, apex rounded or obtuse. Perigynia densely arranged, green to light brown, 2-ribbed and finely veined, 4.2–6.8 × 1.5–2.5 mm, with low, broad papillae; beak purple tinged, mouth hyaline, obliquely bidentate, asymmetrically flared, 0.8–1.8(–2.2) mm. Achenes light to dark brown, 2.2–2.8 × 1.4–2.3 mm. [details]
Cyperaceae Working Group. (2025). [see How to cite]. Global Cyperaceae Database. Carex polymorpha Muhl.. Accessed at: https://www.cyperaceae.org/aphia.php?p=taxdetails&id=1678005 on 2026-05-26
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2024-12-10 11:47:54Z
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Nomenclature
original description
Muhlenberg, G. H. E. (1817). Descriptio Uberior Graminum et Plantarum Calamariarum Americae Septentrionalis Indigenarum et Cicurum. , available online at https://www.biodiversitylibrary.org/page/15348621#page/7/mode/1up
page(s): 239 [details]
page(s): 239 [details]
Other
additional source
Ball, P.W.; Reznicek, A.A.; Murray, D.F. (2002). Magnoliophyta: Commelinidae (in part): Cyperaceae. In: Flora of North America. Vol. 23. Oxford University Press, New York., available online at http://floranorthamerica.org/Cyperaceae [details] Available for editors 
[request]
[request]
Present Inaccurate Introduced: alien Containing type locality
From editor or global species database
Additional information Carex polymorpha, rare throughout its range, is of conservation concern (L. A. Standley and J. L. Dudley 1991). [details]Description Plants colonial, long-rhizomatous. Culms 30–60 cm, scabrous to smooth distally. Leaves: proximal sheaths fibrillose, bladeless, brown- to reddish purple tinged, 2–4.5 mm diam.; ligules 2–10 mm, longer than wide; largest blades green, flat, 4–45 cm × 2.5–6 mm. Inflorescences 6–19 cm, 1.4–2.2 times longer than proximal bract; proximal bracts 2–9 cm; sheath 0.6–2 cm, blade 1.5–7 cm; proximal spikes pistillate or androgynous; lateral spikes cylindric, 1.5–3.5 cm × 7.5–11 mm; terminal 1–3 spikes, staminate. Pistillate scales purple or brown, apex rounded or obtuse. Perigynia densely arranged, green to light brown, 2-ribbed and finely veined, 4.2–6.8 × 1.5–2.5 mm, with low, broad papillae; beak purple tinged, mouth hyaline, obliquely bidentate, asymmetrically flared, 0.8–1.8(–2.2) mm. Achenes light to dark brown, 2.2–2.8 × 1.4–2.3 mm. [details]
Ecology Fruiting early–mid summer. Thin woods with sandy soils; of conservation concern; 30–1200 m. [details]
To Biodiversity Heritage Library (1 publication) (from synonym Carex halseyi Eaton)
To Biodiversity Heritage Library (116 publications)
To Biodiversity Heritage Library (200 publications) (from synonym Carex striata Torr. ex Boott)
To Biodiversity Heritage Library (7 publications) (from synonym Carex halseyana Dewey)
To European Nucleotide Archive, ENA (Carex polymorpha)
To European Nucleotide Archive, ENA (Carex striata) (from synonym Carex striata Torr. ex Boott)
To International Plant Names Index (IPNI) (from synonym Carex halseyi Eaton)
To International Plant Names Index (IPNI) (from synonym Carex striata Torr. ex Boott)
To International Plant Names Index (IPNI) (from synonym Carex halseyana Dewey)
To International Plant Names Index (IPNI) (from synonym Loxotrema halseyana (Dewey) Raf.)
To International Plant Names Index (IPNI)
To Plants of the World Online
To Plants of the World Online (from synonym Loxotrema halseyana (Dewey) Raf.)
To Plants of the World Online (from synonym Carex halseyana Dewey)
To Plants of the World Online (from synonym Carex halseyi Eaton)
To Plants of the World Online (from synonym Carex striata Torr. ex Boott)
To Biodiversity Heritage Library (116 publications)
To Biodiversity Heritage Library (200 publications) (from synonym Carex striata Torr. ex Boott)
To Biodiversity Heritage Library (7 publications) (from synonym Carex halseyana Dewey)
To European Nucleotide Archive, ENA (Carex polymorpha)
To European Nucleotide Archive, ENA (Carex striata) (from synonym Carex striata Torr. ex Boott)
To International Plant Names Index (IPNI) (from synonym Carex halseyi Eaton)
To International Plant Names Index (IPNI) (from synonym Carex striata Torr. ex Boott)
To International Plant Names Index (IPNI) (from synonym Carex halseyana Dewey)
To International Plant Names Index (IPNI) (from synonym Loxotrema halseyana (Dewey) Raf.)
To International Plant Names Index (IPNI)
To Plants of the World Online
To Plants of the World Online (from synonym Loxotrema halseyana (Dewey) Raf.)
To Plants of the World Online (from synonym Carex halseyana Dewey)
To Plants of the World Online (from synonym Carex halseyi Eaton)
To Plants of the World Online (from synonym Carex striata Torr. ex Boott)
