Cyperaceae taxon details
Carex tetrastachya Scheele
1676181 (urn:lsid:marinespecies.org:taxname:1676181)
accepted
Species
Carex brittoniana J.M.Coult. · unaccepted
Carex straminea var. maxima L.H.Bailey · unaccepted
terrestrial
Scheele, A. (1849). Neiträge zur Flor von Texas. <em>Linnaea.</em> 22(6): 339-352., available online at https://www.biodiversitylibrary.org/page/125882#page/342/mode/1up
page(s): 347 [details]
page(s): 347 [details]
Neotype MICH 1259023, geounit Texas
Neotype MICH 1259023, geounit Texas [details]
Description Plants densely to loosely cespitose; rhizomes black, short to ± elongate in old clumps. Culms 30–100 cm; vegetative culms...
Taxonomic remark Source in seed data: wcs Update namepublishedIn from Linnaea 22(3): 347. 1849 [Jul 1849] to Linnaea 22: 347 (1849),...
Description Plants densely to loosely cespitose; rhizomes black, short to ± elongate in old clumps. Culms 30–100 cm; vegetative culms few, inconspicuous, usually fewer than 12 leaves, not strikingly 3-ranked. Leaves: sheath summits with adaxial hyaline band, truncate to rounded, sometimes prolonged beyond collar; distal ligules to 5 mm; blades 3–5 per fertile culm, 13–40 cm × 2.5–5 mm. Inflorescences densely to usually open, at least proximally, silvery white, 2.5–6 cm × 10–25 mm; proximal internode (4–)8–11 mm; 2d internode 4–8 mm; proximal bracts bristlelike to 5 cm. Spikes 2–4(–5), distant, distinct, ovoid to globose-ovoid, 11–18 × 8–13 mm, base attenuate on terminal spike, rounded on lateral spikes, apex rounded. Pistillate scales white-hyaline with light brown 1–3-veined midstripe, lanceolate to ovate, 4–6 mm, as long as and narrower than perignyia. apex acuminate with subulate tip or awnlike, awn of at least proximate staminate scales and sometimes proximal pistillate scales 0.1–0.9(–2.4) mm, scabrous. Perigynia 15–80 in larger spikes, ascending, white with light green margins, veinless over achene on each face, orbiculate or little wider than long, flat, 5.5–8(–8.7) × 3.5–6.3 mm, 0.4–0.5 mm thick, margin flat, including wing 1–2 mm wide, smooth; beak pale brown to reddish at tip, flat, (1.4–)1.6–2.5(–3.4) mm, ciliate-serrulate, abaxial suture inconspicuous or brown, distance from beak tip to achene 2.5–4 mm. Achenes oblong-elliptic, 2.5–3 × 1.5–2 mm, 0.4–0.5 mm thick. n = 30+III. 2n = 64, 66. [details]
Taxonomic remark Source in seed data: wcs Update namepublishedIn from Linnaea 22(3): 347. 1849 [Jul 1849] to Linnaea 22: 347 (1849),...
Taxonomic remark Source in seed data: wcs Update namepublishedIn from Linnaea 22(3): 347. 1849 [Jul 1849] to Linnaea 22: 347 (1849), 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 tetrastachya Scheele. Accessed at: https://cyperaceae.org/aphia.php?p=taxdetails&id=1676181 on 2025-09-12
Date
action
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2024-12-10 11:47:54Z
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db_admin
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Nomenclature
original description
Scheele, A. (1849). Neiträge zur Flor von Texas. <em>Linnaea.</em> 22(6): 339-352., available online at https://www.biodiversitylibrary.org/page/125882#page/342/mode/1up
page(s): 347 [details]
basis of record Plants of the World Online (POWO). , available online at https://powo.science.kew.org/ [details]
page(s): 347 [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
Neotype MICH 1259023, geounit Texas [details]
From editor or global species database
Description Plants densely to loosely cespitose; rhizomes black, short to ± elongate in old clumps. Culms 30–100 cm; vegetative culms few, inconspicuous, usually fewer than 12 leaves, not strikingly 3-ranked. Leaves: sheath summits with adaxial hyaline band, truncate to rounded, sometimes prolonged beyond collar; distal ligules to 5 mm; blades 3–5 per fertile culm, 13–40 cm × 2.5–5 mm. Inflorescences densely to usually open, at least proximally, silvery white, 2.5–6 cm × 10–25 mm; proximal internode (4–)8–11 mm; 2d internode 4–8 mm; proximal bracts bristlelike to 5 cm. Spikes 2–4(–5), distant, distinct, ovoid to globose-ovoid, 11–18 × 8–13 mm, base attenuate on terminal spike, rounded on lateral spikes, apex rounded. Pistillate scales white-hyaline with light brown 1–3-veined midstripe, lanceolate to ovate, 4–6 mm, as long as and narrower than perignyia. apex acuminate with subulate tip or awnlike, awn of at least proximate staminate scales and sometimes proximal pistillate scales 0.1–0.9(–2.4) mm, scabrous. Perigynia 15–80 in larger spikes, ascending, white with light green margins, veinless over achene on each face, orbiculate or little wider than long, flat, 5.5–8(–8.7) × 3.5–6.3 mm, 0.4–0.5 mm thick, margin flat, including wing 1–2 mm wide, smooth; beak pale brown to reddish at tip, flat, (1.4–)1.6–2.5(–3.4) mm, ciliate-serrulate, abaxial suture inconspicuous or brown, distance from beak tip to achene 2.5–4 mm. Achenes oblong-elliptic, 2.5–3 × 1.5–2 mm, 0.4–0.5 mm thick. n = 30+III. 2n = 64, 66. [details]Taxonomic remark Source in seed data: wcs Update namepublishedIn from Linnaea 22(3): 347. 1849 [Jul 1849] to Linnaea 22: 347 (1849), information provided by Alan E. on email Jun. 07 2021 More details could be found in [details]
To Biodiversity Heritage Library (2 publications) (from synonym Carex straminea var. maxima L.H.Bailey)
To Biodiversity Heritage Library (23 publications)
To Biodiversity Heritage Library (7 publications) (from synonym Carex brittoniana J.M.Coult.)
To European Nucleotide Archive, ENA (Carex tetrastachya)
To International Plant Names Index (IPNI) (from synonym Carex brittoniana J.M.Coult.)
To International Plant Names Index (IPNI)
To International Plant Names Index (IPNI) (from synonym Carex straminea var. maxima L.H.Bailey)
To Plants of the World Online
To Plants of the World Online (from synonym Carex brittoniana J.M.Coult.)
To Plants of the World Online (from synonym Carex straminea var. maxima L.H.Bailey)
To Biodiversity Heritage Library (23 publications)
To Biodiversity Heritage Library (7 publications) (from synonym Carex brittoniana J.M.Coult.)
To European Nucleotide Archive, ENA (Carex tetrastachya)
To International Plant Names Index (IPNI) (from synonym Carex brittoniana J.M.Coult.)
To International Plant Names Index (IPNI)
To International Plant Names Index (IPNI) (from synonym Carex straminea var. maxima L.H.Bailey)
To Plants of the World Online
To Plants of the World Online (from synonym Carex brittoniana J.M.Coult.)
To Plants of the World Online (from synonym Carex straminea var. maxima L.H.Bailey)
