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Cyperaceae taxon details

Carex nigromarginata Schwein.

1676596  (urn:lsid:marinespecies.org:taxname:1676596)

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Schweinitz, L. D. (1824). An Analytical Table to facilitate the determination of the hitherto observed North American species of the genus Carex. <em>Annals of the Lyceum of Natural History of New York.</em> 1: 62-71., available online at https://www.biodiversitylibrary.org/page/15913239#page/72/mode/1up
page(s): 68 [details] 
Description Plants densely cespitose; rhizomes ascending to erect, reddish brown, 0–10 mm, stout. Culms 8–27 cm, scabrous distally;...  
Description Plants densely cespitose; rhizomes ascending to erect, reddish brown, 0–10 mm, stout. Culms 8–27 cm, scabrous distally; bases (remnants of old leaves) strongly fibrous. Leaf blades green, greatly exceeding culms, 1.4–4 mm wide, herbaceous, papillose to scabrous abaxially, papillose to scabrous adaxially. Inflorescences with both staminate and pistillate spikes; peduncles of staminate spikes 0.3–0.8 mm; proximal cauline bracts leaflike, usually shorter than inflorescences. Spikes: proximal pistillate spikes 2–3 (basal spikes 0); cauline spikes overlapping, proximal 2 separated by less than 7 mm, with 6–15 perigynia; staminate spikes 5.3–10 × 1.1–2.3 mm. Scales: pistillate scales pale to, usually, dark reddish brown to purplish brown, with similarly colored or narrow white margins, ovate to lanceolate, 2.9–3.7 × 1.2–2 mm, equaling or exceeding perigynia, apex acute to acuminate or cuspidate; staminate scales ovate, 3–4.3 × 1–1.8 mm, apex obtuse to acute or acuminate. Anthers 1.4–2.6 mm. Perigynia pale green, veinless, ellipsoid, 2.8–3.6 × 1–1.3 mm, longer than wide; beak straight, pale green, 0.7–1 mm, weakly ciliate-serrulate, apical teeth 0.1–0.4 mm. Stigmas 3. Achenes brown, ellipsoid, obtusely trigonous in cross section, 1.4–2 × 0.9–1.2 mm. 2n = 36. [details]

Taxonomic remark Source in seed data: wcs Update namepublishedIn from Ann. Lyceum Nat. Hist. New York 1: 68 1824 to Ann. Lyceum Nat. Hist....  
Taxonomic remark Source in seed data: wcs Update namepublishedIn from Ann. Lyceum Nat. Hist. New York 1: 68 1824 to Ann. Lyceum Nat. Hist. New York 1: 68 (1824), information provided by Alan E. on email Jun. 07 2021 More details could be found in [details]
Cyperaceae Working Group. (2025). [see How to cite]. Global Cyperaceae Database. Carex nigromarginata Schwein.. Accessed at: https://cyperaceae.org/aphia.php?p=taxdetails&id=1676596 on 2025-09-13
Date
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2023-09-06 07:28:28Z
created
2024-12-10 11:47:54Z
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2025-03-11 11:19:03Z
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Nomenclature

original description Schweinitz, L. D. (1824). An Analytical Table to facilitate the determination of the hitherto observed North American species of the genus Carex. <em>Annals of the Lyceum of Natural History of New York.</em> 1: 62-71., available online at https://www.biodiversitylibrary.org/page/15913239#page/72/mode/1up
page(s): 68 [details] 

basis of record Plants of the World Online (POWO). , available online at https://powo.science.kew.org/ [details] 

 
 Present  Inaccurate  Introduced: alien  Containing type locality 
   

Syntype NY 00011245, geounit North Carolina [details]
From editor or global species database
Description Plants densely cespitose; rhizomes ascending to erect, reddish brown, 0–10 mm, stout. Culms 8–27 cm, scabrous distally; bases (remnants of old leaves) strongly fibrous. Leaf blades green, greatly exceeding culms, 1.4–4 mm wide, herbaceous, papillose to scabrous abaxially, papillose to scabrous adaxially. Inflorescences with both staminate and pistillate spikes; peduncles of staminate spikes 0.3–0.8 mm; proximal cauline bracts leaflike, usually shorter than inflorescences. Spikes: proximal pistillate spikes 2–3 (basal spikes 0); cauline spikes overlapping, proximal 2 separated by less than 7 mm, with 6–15 perigynia; staminate spikes 5.3–10 × 1.1–2.3 mm. Scales: pistillate scales pale to, usually, dark reddish brown to purplish brown, with similarly colored or narrow white margins, ovate to lanceolate, 2.9–3.7 × 1.2–2 mm, equaling or exceeding perigynia, apex acute to acuminate or cuspidate; staminate scales ovate, 3–4.3 × 1–1.8 mm, apex obtuse to acute or acuminate. Anthers 1.4–2.6 mm. Perigynia pale green, veinless, ellipsoid, 2.8–3.6 × 1–1.3 mm, longer than wide; beak straight, pale green, 0.7–1 mm, weakly ciliate-serrulate, apical teeth 0.1–0.4 mm. Stigmas 3. Achenes brown, ellipsoid, obtusely trigonous in cross section, 1.4–2 × 0.9–1.2 mm. 2n = 36. [details]

Taxonomic remark Source in seed data: wcs Update namepublishedIn from Ann. Lyceum Nat. Hist. New York 1: 68 1824 to Ann. Lyceum Nat. Hist. New York 1: 68 (1824), information provided by Alan E. on email Jun. 07 2021 More details could be found in [details]