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Cyperaceae taxon details

Carex cristatella Britton

1676743  (urn:lsid:marinespecies.org:taxname:1676743)

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Britton, N. L. & Brown, A. (1896). An illustrated flora of the northern United States, Canada and the British possesions from Newfoundland to the parallel of the southern boundary of Virginia and from the Atlantic Ocean westward to the 102d meridian. 3., available online at https://www.biodiversitylibrary.org/page/11287153#page/7/mode/1up
note: 357 [details] 
Description Plants densely cespitose. Culms 30–100 cm; vegetative culms with numerous leaves spaced evenly along distal 1/2. Leaves:...  
Description Plants densely cespitose. Culms 30–100 cm; vegetative culms with numerous leaves spaced evenly along distal 1/2. Leaves: sheaths adaxially green-veined nearly to collar, with V-shaped hyaline band extending 4–20 mm proximal to collar; somewhat loose, expanded near summit, ± wing-angled, adaxially firm, summits truncate to U-shaped, prolonged beyond collar; distal ligules 4–10 mm; blades 4–6 per fertile culm, 13–40 cm × 3–7.5 mm. Inflorescences dense or proximally open, brown, 2–4(–4.5) cm × 8–15 mm; proximal internode 2–6 mm; 2d internode 2–4 mm; proximal bracts scalelike with bristle tip to 1(–8) cm. Spikes 6–15, usually widely spaced, globose, 4–8 × 4–8 mm, base rounded to tapered, apex rounded. Pistillate scales white-hyaline or pale brown with green to brown midstripe not reaching tip, lanceolate, 1.6–2.3 mm, 1/2 length of and narrower than perigynia, hidden by perignyium beaks, apex acute or ultimate apex often rounded to retuse. Perigynia spreading to ascending, with beak and distal body of perigynium spreading or recurrent at 80º angle or greater, pale green to pale brown, conspicuously 3–6-veined abaxially, conspicuously 2–6-veined adaxially, ovate to elliptic, plano-convex, 2–3.5 times as long as wide, 2.7–4 × 1–1.7 mm, 0.3–0.4 mm thick, margin flat, including wing 0.1–0.2 mm wide, abruptly narrowed proximally, not extending to base; beak tip usually not colored, flat, ciliate-serrulate, distance from beak tip to achene 1.5–1.8 mm. Achenes oblong-ovate, 1.2–1.5 × 0.6–0.8 mm, 0.3–0.4 mm thick. 2n = 70. [details]

Taxonomic remark Source in seed data: wcs Updated scientificnameAuthorship from Britton & A.Br. to Britton & A.Brown, information provided...  
Taxonomic remark Source in seed data: wcs Updated scientificnameAuthorship from Britton & A.Br. to Britton & A.Brown, information provided by Alan E. on email Oct. 12 2020 More details could be found in The Pl [details]
Cyperaceae Working Group. (2025). [see How to cite]. Global Cyperaceae Database. Carex cristatella Britton. Accessed at: https://cyperaceae.org/aphia.php?p=taxdetails&id=1676743 on 2025-09-12
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 Britton, N. L. & Brown, A. (1896). An illustrated flora of the northern United States, Canada and the British possesions from Newfoundland to the parallel of the southern boundary of Virginia and from the Atlantic Ocean westward to the 102d meridian. 3., available online at https://www.biodiversitylibrary.org/page/11287153#page/7/mode/1up
note: 357 [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 
   

Isotype (of Carex cristata Schwein.) P 00304217, geounit United States [details]
From editor or global species database
Description Plants densely cespitose. Culms 30–100 cm; vegetative culms with numerous leaves spaced evenly along distal 1/2. Leaves: sheaths adaxially green-veined nearly to collar, with V-shaped hyaline band extending 4–20 mm proximal to collar; somewhat loose, expanded near summit, ± wing-angled, adaxially firm, summits truncate to U-shaped, prolonged beyond collar; distal ligules 4–10 mm; blades 4–6 per fertile culm, 13–40 cm × 3–7.5 mm. Inflorescences dense or proximally open, brown, 2–4(–4.5) cm × 8–15 mm; proximal internode 2–6 mm; 2d internode 2–4 mm; proximal bracts scalelike with bristle tip to 1(–8) cm. Spikes 6–15, usually widely spaced, globose, 4–8 × 4–8 mm, base rounded to tapered, apex rounded. Pistillate scales white-hyaline or pale brown with green to brown midstripe not reaching tip, lanceolate, 1.6–2.3 mm, 1/2 length of and narrower than perigynia, hidden by perignyium beaks, apex acute or ultimate apex often rounded to retuse. Perigynia spreading to ascending, with beak and distal body of perigynium spreading or recurrent at 80º angle or greater, pale green to pale brown, conspicuously 3–6-veined abaxially, conspicuously 2–6-veined adaxially, ovate to elliptic, plano-convex, 2–3.5 times as long as wide, 2.7–4 × 1–1.7 mm, 0.3–0.4 mm thick, margin flat, including wing 0.1–0.2 mm wide, abruptly narrowed proximally, not extending to base; beak tip usually not colored, flat, ciliate-serrulate, distance from beak tip to achene 1.5–1.8 mm. Achenes oblong-ovate, 1.2–1.5 × 0.6–0.8 mm, 0.3–0.4 mm thick. 2n = 70. [details]

Taxonomic remark Source in seed data: wcs Updated scientificnameAuthorship from Britton & A.Br. to Britton & A.Brown, information provided by Alan E. on email Oct. 12 2020 More details could be found in The Pl [details]