Cyperaceae taxon details
Schoenoplectus heterochaetus (Chase) Soják
1681391 (urn:lsid:marinespecies.org:taxname:1681391)
accepted
Species
Scirpus heterochaetus Chase · unaccepted
Scirpus lacustris var. tenuiculmis E.Sheld. · unaccepted
terrestrial
(of Scirpus heterochaetus Chase) Chase, A. (1904). The North American allies of Scirpus lacustris. <em>Rhodora.</em> 6: 65-71., available online at https://www.biodiversitylibrary.org/page/562357#page/1/mode/1up
page(s): 70 [details]
page(s): 70 [details]
Holotype (of Scirpus heterochaetus Chase) US 00086856,...
Holotype (of Scirpus heterochaetus Chase) US 00086856, geounit Havana [details]
Description Rhizomes 5–8 mm diam.; scales longer than internodes, disintegrating to fibers. Culms cylindric, 1.5–2.5 m × 4–8 mm....
Taxonomic remark Source in seed data: wcs Update namepublishedIn from Cas. Nšr. Mus., Odd. Pršr. 140: 127 1927 to Cas. Nšr. Mus., Odd....
Description Rhizomes 5–8 mm diam.; scales longer than internodes, disintegrating to fibers. Culms cylindric, 1.5–2.5 m × 4–8 mm. Leaves basal; sheaths often separating from culm, resembling blade, sometimes reddish proximally, front membranous-translucent, splitting, and delicately pinnate-fibrillose, orifice adaxially deeply V-shaped; ligules entire, 1 mm; blades 1–2, thinly C-shaped to thin and dorsiventrally flat in cross section, much shorter to longer than sheath, distal blade to 220 × 5 mm. Inflorescences 2× branched, open, plano- to concavo-convex, to 9 cm; proximal bract usually erect, thickly C-shaped to subterete in cross section, 1–15 cm, margins often scabridulous. Spikelets 5–30, solitary or rarely 2 together, 5–15 × 3–4 mm; scales light orange-brown to nearly colorless, usually obscurely lineolate-spotted, midribs often greenish, ovate-oblong, 3–4 × 1.5 mm, sparsely reddish- or straw-colored-scabrous distally on awn, sometimes midrib, and rarely adjacent parts of sides, margins ciliate, hairs contorted, flanks veinless, apex obtuse, notch 0.5 mm deep, awn straight to slightly contorted, 0.3–1 mm. Flowers: perianth members 4(–5), brown, bristlelike, equaling achene body or adaxial and abaxial much shorter, sparsely retrorsely spinulose; anthers 2 mm; styles 3-fid. Achenes dark gray-brown, compressed-trigonous, obovoid, 2.2–3.2 × 1.4–1.9 mm; beak 0.3–1 mm. 2n = 38. [details]
Taxonomic remark Source in seed data: wcs Update namepublishedIn from Cas. Nšr. Mus., Odd. Pršr. 140: 127 1927 to Cas. Nšr. Mus., Odd....
Taxonomic remark Source in seed data: wcs Update namepublishedIn from Cas. Nšr. Mus., Odd. Pršr. 140: 127 1927 to Cas. Nšr. Mus., Odd. Pršr. 140: 127 (1927), 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. Schoenoplectus heterochaetus (Chase) Soják. Accessed at: https://cyperaceae.org/aphia.php?p=taxdetails&id=1681391 on 2025-09-12
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Attribution 4.0 License
Nomenclature
original description
(of Scirpus heterochaetus Chase) Chase, A. (1904). The North American allies of Scirpus lacustris. <em>Rhodora.</em> 6: 65-71., available online at https://www.biodiversitylibrary.org/page/562357#page/1/mode/1up
page(s): 70 [details]
basis of record Plants of the World Online (POWO). , available online at https://powo.science.kew.org/ [details]
new combination reference (1972). Čas. Nár. Mus., Odd. Přír. 140(3-4)
page(s): 127 [details]
page(s): 70 [details]
basis of record Plants of the World Online (POWO). , available online at https://powo.science.kew.org/ [details]
new combination reference (1972). Čas. Nár. Mus., Odd. Přír. 140(3-4)
page(s): 127 [details]
Present Inaccurate Introduced: alien Containing type locality
Holotype (of Scirpus heterochaetus Chase) US 00086856, geounit Havana [details]
From editor or global species database
Description Rhizomes 5–8 mm diam.; scales longer than internodes, disintegrating to fibers. Culms cylindric, 1.5–2.5 m × 4–8 mm. Leaves basal; sheaths often separating from culm, resembling blade, sometimes reddish proximally, front membranous-translucent, splitting, and delicately pinnate-fibrillose, orifice adaxially deeply V-shaped; ligules entire, 1 mm; blades 1–2, thinly C-shaped to thin and dorsiventrally flat in cross section, much shorter to longer than sheath, distal blade to 220 × 5 mm. Inflorescences 2× branched, open, plano- to concavo-convex, to 9 cm; proximal bract usually erect, thickly C-shaped to subterete in cross section, 1–15 cm, margins often scabridulous. Spikelets 5–30, solitary or rarely 2 together, 5–15 × 3–4 mm; scales light orange-brown to nearly colorless, usually obscurely lineolate-spotted, midribs often greenish, ovate-oblong, 3–4 × 1.5 mm, sparsely reddish- or straw-colored-scabrous distally on awn, sometimes midrib, and rarely adjacent parts of sides, margins ciliate, hairs contorted, flanks veinless, apex obtuse, notch 0.5 mm deep, awn straight to slightly contorted, 0.3–1 mm. Flowers: perianth members 4(–5), brown, bristlelike, equaling achene body or adaxial and abaxial much shorter, sparsely retrorsely spinulose; anthers 2 mm; styles 3-fid. Achenes dark gray-brown, compressed-trigonous, obovoid, 2.2–3.2 × 1.4–1.9 mm; beak 0.3–1 mm. 2n = 38. [details]Taxonomic remark Source in seed data: wcs Update namepublishedIn from Cas. Nšr. Mus., Odd. Pršr. 140: 127 1927 to Cas. Nšr. Mus., Odd. Pršr. 140: 127 (1927), information provided by Alan E. on email Jun. 07 2021 More details could be found in [details]
To Biodiversity Heritage Library (23 publications)
To Biodiversity Heritage Library (66 publications) (from synonym Scirpus heterochaetus Chase)
To European Nucleotide Archive, ENA (Schoenoplectus heterochaetus)
To GenBank (9 nucleotides; 6 proteins)
To International Plant Names Index (IPNI)
To International Plant Names Index (IPNI) (from synonym Scirpus heterochaetus Chase)
To International Plant Names Index (IPNI) (from synonym Schoenoplectus lacustris subsp. tenuiculmis (E.Sheld.) Soják)
To International Plant Names Index (IPNI) (from synonym Scirpus lacustris var. tenuiculmis E.Sheld.)
To IUCN Red List (Least Concern)
To Plants of the World Online (from synonym Scirpus heterochaetus Chase)
To Plants of the World Online
To Plants of the World Online (from synonym Scirpus lacustris var. tenuiculmis E.Sheld.)
To Plants of the World Online (from synonym Schoenoplectus lacustris subsp. tenuiculmis (E.Sheld.) Soják)
To University of Minnesota Herbarium (Scirpus lacustris var. tenuiculmis MIN221232 syntype 1) (from synonym Scirpus lacustris var. tenuiculmis E.Sheld.)
To University of Minnesota Herbarium (Scirpus lacustris var. tenuiculmis MIN83585 syntype 1) (from synonym Scirpus lacustris var. tenuiculmis E.Sheld.)
To University of Minnesota Herbarium (Scirpus lacustris var. tenuiculmis MIN83586 syntype 1) (from synonym Scirpus lacustris var. tenuiculmis E.Sheld.)
To University of Minnesota Herbarium (Scirpus lacustris var. tenuiculmis MIN83587 syntype 1) (from synonym Scirpus lacustris var. tenuiculmis E.Sheld.)
To US Herbarium (Scirpus heterochaetus US27519 type 1) (from synonym Scirpus heterochaetus Chase)
To Biodiversity Heritage Library (66 publications) (from synonym Scirpus heterochaetus Chase)
To European Nucleotide Archive, ENA (Schoenoplectus heterochaetus)
To GenBank (9 nucleotides; 6 proteins)
To International Plant Names Index (IPNI)
To International Plant Names Index (IPNI) (from synonym Scirpus heterochaetus Chase)
To International Plant Names Index (IPNI) (from synonym Schoenoplectus lacustris subsp. tenuiculmis (E.Sheld.) Soják)
To International Plant Names Index (IPNI) (from synonym Scirpus lacustris var. tenuiculmis E.Sheld.)
To IUCN Red List (Least Concern)
To Plants of the World Online (from synonym Scirpus heterochaetus Chase)
To Plants of the World Online
To Plants of the World Online (from synonym Scirpus lacustris var. tenuiculmis E.Sheld.)
To Plants of the World Online (from synonym Schoenoplectus lacustris subsp. tenuiculmis (E.Sheld.) Soják)
To University of Minnesota Herbarium (Scirpus lacustris var. tenuiculmis MIN221232 syntype 1) (from synonym Scirpus lacustris var. tenuiculmis E.Sheld.)
To University of Minnesota Herbarium (Scirpus lacustris var. tenuiculmis MIN83585 syntype 1) (from synonym Scirpus lacustris var. tenuiculmis E.Sheld.)
To University of Minnesota Herbarium (Scirpus lacustris var. tenuiculmis MIN83586 syntype 1) (from synonym Scirpus lacustris var. tenuiculmis E.Sheld.)
To University of Minnesota Herbarium (Scirpus lacustris var. tenuiculmis MIN83587 syntype 1) (from synonym Scirpus lacustris var. tenuiculmis E.Sheld.)
To US Herbarium (Scirpus heterochaetus US27519 type 1) (from synonym Scirpus heterochaetus Chase)
