Cyperaceae taxon details
Schoenoplectus deltarum (Schuyler) Soják
1681386 (urn:lsid:marinespecies.org:taxname:1681386)
accepted
Species
Scirpus deltarum Schuyler · unaccepted
terrestrial
(of Scirpus deltarum Schuyler) Schuyler, A. E. (1970). A new North American Aquatic Bulrush (Cyperaceae: Scirpus). <em>Notulae Naturae.</em> 427: 4 pp. [details]
Holotype (of Scirpus deltarum Schuyler) PH 00022643,...
Holotype (of Scirpus deltarum Schuyler) PH 00022643, geounit Louisiana [details]
Description Rhizomes 2–6 mm diam.; scales much shorter than internodes, disintegrating to fibers. Culms sharply trigonous, sides...
Taxonomic remark perhaps Schoenoplectus americanus (Pers.) Volkart × Schoenoplectus pungens (Vahl) Palla
Taxonomic remark Source in seed data: wcs Update namepublishedIn from Cas. Nšr. Mus., Odd. Pršr. 141: 62 1972 to Cas. Nšr. Mus., Odd....
Description Rhizomes 2–6 mm diam.; scales much shorter than internodes, disintegrating to fibers. Culms sharply trigonous, sides convex to flat near base, concave distally, 0.7–2.3 m × 2.5–6 mm, smooth. Leaves 3–5, basal; sheath fronts not pinnate-fibrillose; blades 2–3, proximally V-shaped, distally trigonous to asymmetrically laterally flattened in cross section, angles distally scabridulous; distal blade 1–1.5 times as long as sheath, 9–30 cm × 2–7 mm. Inflorescences capitate or rarely with 1–2 branches to 5 mm; proximal bract usually erect, resembling leaf blade, trigonous proximally, (1–)3–20 cm. Spikelets 3–35, 6–15 × 4–5 mm; scales bright orange-brown or partly purplish, ovate, 3.5–5.5 × 2–3 mm, smooth or awn sparsely spinulose, margins deciduously ciliolate, flanks of proximal scale sometimes with a few ribs, midrib prominent, apex acute, notch 0.6–1 mm deep, awn irregularly bent, 1–1.5 mm. Flowers: perianth members 3–6, orange-brown, bristlelike, very slender, some equaling achene, some often rudimentary, retrorsely spinulose; anthers 2–3 mm; styles 2-fid. Achenes brown, unequally biconvex, obovoid to obpyriform, 1.9–2.6 × 1.3–1.7 mm; beak 0.1–0.3 mm. 2n = 78. [details]
Taxonomic remark perhaps Schoenoplectus americanus (Pers.) Volkart × Schoenoplectus pungens (Vahl) Palla
Taxonomic remark perhaps Schoenoplectus americanus (Pers.) Volkart × Schoenoplectus pungens (Vahl) Palla [details]
Taxonomic remark Source in seed data: wcs Update namepublishedIn from Cas. Nšr. Mus., Odd. Pršr. 141: 62 1972 to Cas. Nšr. Mus., Odd....
Taxonomic remark Source in seed data: wcs Update namepublishedIn from Cas. Nšr. Mus., Odd. Pršr. 141: 62 1972 to Cas. Nšr. Mus., Odd. Pršr. 141: 62 (1972), 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 deltarum (Schuyler) Soják. Accessed at: https://cyperaceae.org/aphia.php?p=taxdetails&id=1681386 on 2025-09-12
The webpage text is licensed under a Creative Commons
Attribution 4.0 License
Nomenclature
original description
(of Scirpus deltarum Schuyler) Schuyler, A. E. (1970). A new North American Aquatic Bulrush (Cyperaceae: Scirpus). <em>Notulae Naturae.</em> 427: 4 pp. [details]
basis of record Plants of the World Online (POWO). , available online at https://powo.science.kew.org/ [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
Holotype (of Scirpus deltarum Schuyler) PH 00022643, geounit Louisiana [details]
From editor or global species database
Description Rhizomes 2–6 mm diam.; scales much shorter than internodes, disintegrating to fibers. Culms sharply trigonous, sides convex to flat near base, concave distally, 0.7–2.3 m × 2.5–6 mm, smooth. Leaves 3–5, basal; sheath fronts not pinnate-fibrillose; blades 2–3, proximally V-shaped, distally trigonous to asymmetrically laterally flattened in cross section, angles distally scabridulous; distal blade 1–1.5 times as long as sheath, 9–30 cm × 2–7 mm. Inflorescences capitate or rarely with 1–2 branches to 5 mm; proximal bract usually erect, resembling leaf blade, trigonous proximally, (1–)3–20 cm. Spikelets 3–35, 6–15 × 4–5 mm; scales bright orange-brown or partly purplish, ovate, 3.5–5.5 × 2–3 mm, smooth or awn sparsely spinulose, margins deciduously ciliolate, flanks of proximal scale sometimes with a few ribs, midrib prominent, apex acute, notch 0.6–1 mm deep, awn irregularly bent, 1–1.5 mm. Flowers: perianth members 3–6, orange-brown, bristlelike, very slender, some equaling achene, some often rudimentary, retrorsely spinulose; anthers 2–3 mm; styles 2-fid. Achenes brown, unequally biconvex, obovoid to obpyriform, 1.9–2.6 × 1.3–1.7 mm; beak 0.1–0.3 mm. 2n = 78. [details]Taxonomic remark perhaps Schoenoplectus americanus (Pers.) Volkart × Schoenoplectus pungens (Vahl) Palla [details]
Taxonomic remark Source in seed data: wcs Update namepublishedIn from Cas. Nšr. Mus., Odd. Pršr. 141: 62 1972 to Cas. Nšr. Mus., Odd. Pršr. 141: 62 (1972), information provided by Alan E. on email Jun. 07 2021 More details could be found in [details]
To Biodiversity Heritage Library (2 publications)
To Biodiversity Heritage Library (7 publications) (from synonym Scirpus deltarum Schuyler)
To European Nucleotide Archive, ENA (Schoenoplectus deltarum)
To GenBank (4 nucleotides; 1 proteins)
To International Plant Names Index (IPNI)
To International Plant Names Index (IPNI) (from synonym Scirpus deltarum Schuyler)
To Plants of the World Online
To Plants of the World Online (from synonym Scirpus deltarum Schuyler)
To Royal Botanic Gardens, Kew (Scirpus deltarum K001057164 isotype 1) (from synonym Scirpus deltarum Schuyler)
To Biodiversity Heritage Library (7 publications) (from synonym Scirpus deltarum Schuyler)
To European Nucleotide Archive, ENA (Schoenoplectus deltarum)
To GenBank (4 nucleotides; 1 proteins)
To International Plant Names Index (IPNI)
To International Plant Names Index (IPNI) (from synonym Scirpus deltarum Schuyler)
To Plants of the World Online
To Plants of the World Online (from synonym Scirpus deltarum Schuyler)
To Royal Botanic Gardens, Kew (Scirpus deltarum K001057164 isotype 1) (from synonym Scirpus deltarum Schuyler)
From editor or global species database
Hosted externally, from synonym
