Cyperaceae taxon details
Carex arapahoensis Clokey
1677216 (urn:lsid:marinespecies.org:taxname:1677216)
accepted
Species
terrestrial
Clokey, J. W. (1919). Carex notes. Rhodora , 21(244): 83-85.
page(s): 83 [details]
page(s): 83 [details]
Description Plants densely cespitose. Culms 20–30 cm. Leaves: sheaths white-hyaline, summits usually U-shaped; distal ligules...
Taxonomic remark Source in seed data: wcs Update namepublishedIn from Rhodora 21: 83 1919 to Rhodora 21: 83 (1919), information provided by...
Description Plants densely cespitose. Culms 20–30 cm. Leaves: sheaths white-hyaline, summits usually U-shaped; distal ligules 1–2(–2.5) mm; blades 3(–5) per fertile culm, 10–40 cm × 2.2–3.2 mm. Inflorescences dense or sometimes open proximally, brown or purplish, 1.2–2(–2.5) cm × (8–)12–18 mm; proximal internode 1.5–3.5 mm; 2d internode 0.5–2.5 mm; proximal bracts bristlelike, shorter than inflorescences. Spikes 4–5, densely aggregated, usually at least proximal 1 distinct, obovoid, 9–12 × (5.5–)7–9 mm, base rounded or attenuate, apex rounded or acute. Pistillate scales red- or purple-brown to dark brown, sometimes gold above the middle, sometimes with paler midstripe, ovate to broadly ovate, 4.3–5.6 mm, shorter than or equaling perigynium beaks, equaling or narrower than perigynia, margin white-hyaline, green, or gold 0.15–0.3 mm wide, apex usually acute. Anthers long-persistent. Perigynia appressed to ascending, usually dark brown, often green or gold distally and at margins, veinless or conspicuously 3–6-veined abaxially, inconspicuously veined adaxially, broadly obovate to broadly ovate, flat except over achene, 4–5.5 × 2–2.7 mm, 0.25–0.4(–0.5) mm thick, margin flat, including wing 0.4–0.6 mm wide, ciliate-serrulate at least on distal body; beak purplish or brown to red-brown, white-hyaline at tip, cylindric, unwinged, entire for 0.5–1.3 mm from tip, abaxial suture with conspicuous white margin, distance from beak tip to achene (1.9–)2.2–2.9 mm. Achenes obovate or ovate, 1.6–2.1 × 1–1.4 mm, 0.3–0.5 mm thick.
[details]
[details]
Taxonomic remark Source in seed data: wcs Update namepublishedIn from Rhodora 21: 83 1919 to Rhodora 21: 83 (1919), information provided by...
Taxonomic remark Source in seed data: wcs Update namepublishedIn from Rhodora 21: 83 1919 to Rhodora 21: 83 (1919), information provided by Alan E. on email Jun. 07 2021 More details could be found in The Pla [details]
Cyperaceae Working Group. (2025). [see How to cite]. Global Cyperaceae Database. Carex arapahoensis Clokey. Accessed at: https://cyperaceae.org/aphia.php?p=taxdetails&id=1677216 on 2025-09-13
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2024-12-10 11:47:54Z
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Nomenclature
original description
Clokey, J. W. (1919). Carex notes. Rhodora , 21(244): 83-85.
page(s): 83 [details]
basis of record Plants of the World Online (POWO). , available online at https://powo.science.kew.org/ [details]
page(s): 83 [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 US 01105915, geounit Colorado [details]
From editor or global species database
Description Plants densely cespitose. Culms 20–30 cm. Leaves: sheaths white-hyaline, summits usually U-shaped; distal ligules 1–2(–2.5) mm; blades 3(–5) per fertile culm, 10–40 cm × 2.2–3.2 mm. Inflorescences dense or sometimes open proximally, brown or purplish, 1.2–2(–2.5) cm × (8–)12–18 mm; proximal internode 1.5–3.5 mm; 2d internode 0.5–2.5 mm; proximal bracts bristlelike, shorter than inflorescences. Spikes 4–5, densely aggregated, usually at least proximal 1 distinct, obovoid, 9–12 × (5.5–)7–9 mm, base rounded or attenuate, apex rounded or acute. Pistillate scales red- or purple-brown to dark brown, sometimes gold above the middle, sometimes with paler midstripe, ovate to broadly ovate, 4.3–5.6 mm, shorter than or equaling perigynium beaks, equaling or narrower than perigynia, margin white-hyaline, green, or gold 0.15–0.3 mm wide, apex usually acute. Anthers long-persistent. Perigynia appressed to ascending, usually dark brown, often green or gold distally and at margins, veinless or conspicuously 3–6-veined abaxially, inconspicuously veined adaxially, broadly obovate to broadly ovate, flat except over achene, 4–5.5 × 2–2.7 mm, 0.25–0.4(–0.5) mm thick, margin flat, including wing 0.4–0.6 mm wide, ciliate-serrulate at least on distal body; beak purplish or brown to red-brown, white-hyaline at tip, cylindric, unwinged, entire for 0.5–1.3 mm from tip, abaxial suture with conspicuous white margin, distance from beak tip to achene (1.9–)2.2–2.9 mm. Achenes obovate or ovate, 1.6–2.1 × 1–1.4 mm, 0.3–0.5 mm thick.[details]
Taxonomic remark Source in seed data: wcs Update namepublishedIn from Rhodora 21: 83 1919 to Rhodora 21: 83 (1919), information provided by Alan E. on email Jun. 07 2021 More details could be found in The Pla [details]
To Biodiversity Heritage Library (22 publications)
To European Nucleotide Archive, ENA (Carex arapahoensis)
To GenBank (7 nucleotides; 1 proteins)
To International Plant Names Index (IPNI)
To IUCN Red List (Least Concern)
To Plants of the World Online
To US Herbarium (Carex arapahoensis US1200685 type 1)
To US Herbarium (Carex arapahoensis US3156240 type 1)
To European Nucleotide Archive, ENA (Carex arapahoensis)
To GenBank (7 nucleotides; 1 proteins)
To International Plant Names Index (IPNI)
To IUCN Red List (Least Concern)
To Plants of the World Online
To US Herbarium (Carex arapahoensis US1200685 type 1)
To US Herbarium (Carex arapahoensis US3156240 type 1)
From editor or global species database
Hosted externally
Hosted externally
