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Cyperaceae taxon details

Eleocharis interstincta (Vahl) Roem. & Schult.

To Field Museum Herbarium (Eleocharis articulata Lindl. & Nees ex Nees photographed at B type [status unknown] 1)
To Field Museum Herbarium (Eleocharis articulata Lindl. & Nees ex Nees photographed at B type [status unknown] 1)

1491862  (urn:lsid:marinespecies.org:taxname:1491862)

  1. Biota
  2. Plantae (Kingdom)
  3. Viridiplantae (Subkingdom)
  4. Streptophyta (Infrakingdom)
  5. Tracheophyta (Phylum (Division))
  6. Spermatophytina (Subphylum (Subdivision))
  7. Magnoliopsida (Class)
  8. Lilianae (Superorder)
  9. Poales (Order)
  10. Cyperaceae (Family)
  11. Eleocharideae (Tribe)
  12. Eleocharis (Genus)
  13. Eleocharis interstincta (Species)
accepted
Species
terrestrial
Not documented
Description Plants perennial; rhizomes 2–4 mm thick, firm, longer internodes 3–7.5 cm, scales 5 mm, tubers absent. Culms terete,...  
Description Plants perennial; rhizomes 2–4 mm thick, firm, longer internodes 3–7.5 cm, scales 5 mm, tubers absent. Culms terete, 45–100 cm × (3.2–)5–9.4 mm, soft to firm, sometimes septate-nodulose proximally, not distally, internally hollow with complete transverse septa, closer together near the spikelet, evident externally; plants never forming filiform, flaccid culms. Leaves: distal leaf sheaths persistent, membranous to thinly papery, apex acute to acuminate. Spikelets not proliferous, (20–)40–62 × 4–7 mm; rachilla joints bearing prominent wing-like remnants of floral scales; proximal scale empty, amplexicaulous, (3–)3.5–5 mm; floral scales 115–220, 1–3 per mm of rachilla, stramineous to pale brown, usually with pale to dark brown submarginal band, midrib region sometimes greenish, obovate to broadly oblong, (4–)4.5–5 × 2.8–4 mm, cartilaginous, often membranous toward margins, margins broadly translucent, membranous, apex rounded to subacute. Flowers: perianth bristles 6–8, stramineous, stout, flattened, subequal, exceeding achene, to 2.9 mm, coarsely spinulose; anthers stramineous to reddish, 2.5–5 mm; styles 2-fid or 3-fid. Achenes stramineous to golden-yellow or reddish brown or gray, obovoid to obpyriform, biconvex or nearly plano-convex, often with abaxial longitudinal ridge, 1.4–1.8(–2) × 1.1–1.4 mm, markedly sculptured at 10–15X, each face with 23–37 rows of transversely elongated cells, the longitudinal walls separating the cells often prominent, apex with short neck 0.7–0.8 mm wide. Tubercles dark brown, lamelliform, slightly higher than wide, 0.7–1.1 × 0.5–0.7 mm. [details]

Taxonomic remark Source in seed data: wcs Update namepublishedIn from Syst. Veg., ed. 15 bis [Roemer & Schultes] 2: 149. 1817 [Nov 1817] to...  
Taxonomic remark Source in seed data: wcs Update namepublishedIn from Syst. Veg., ed. 15 bis [Roemer & Schultes] 2: 149. 1817 [Nov 1817] to Syst. Veg., ed. 15 bis 2: 149 (1817), 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. Eleocharis interstincta (Vahl) Roem. & Schult.. Accessed at: https://cyperaceae.org/aphia.php?p=taxdetails&id=1491862 on 2025-09-14
Date
action
by
2021-03-16 12:37:04Z
created
db_admin
2023-09-05 06:47:53Z
changed
Larridon, Isabel
2024-12-10 11:47:54Z
unchecked
db_admin

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Nomenclature

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 
   

From editor or global species database
Description Plants perennial; rhizomes 2–4 mm thick, firm, longer internodes 3–7.5 cm, scales 5 mm, tubers absent. Culms terete, 45–100 cm × (3.2–)5–9.4 mm, soft to firm, sometimes septate-nodulose proximally, not distally, internally hollow with complete transverse septa, closer together near the spikelet, evident externally; plants never forming filiform, flaccid culms. Leaves: distal leaf sheaths persistent, membranous to thinly papery, apex acute to acuminate. Spikelets not proliferous, (20–)40–62 × 4–7 mm; rachilla joints bearing prominent wing-like remnants of floral scales; proximal scale empty, amplexicaulous, (3–)3.5–5 mm; floral scales 115–220, 1–3 per mm of rachilla, stramineous to pale brown, usually with pale to dark brown submarginal band, midrib region sometimes greenish, obovate to broadly oblong, (4–)4.5–5 × 2.8–4 mm, cartilaginous, often membranous toward margins, margins broadly translucent, membranous, apex rounded to subacute. Flowers: perianth bristles 6–8, stramineous, stout, flattened, subequal, exceeding achene, to 2.9 mm, coarsely spinulose; anthers stramineous to reddish, 2.5–5 mm; styles 2-fid or 3-fid. Achenes stramineous to golden-yellow or reddish brown or gray, obovoid to obpyriform, biconvex or nearly plano-convex, often with abaxial longitudinal ridge, 1.4–1.8(–2) × 1.1–1.4 mm, markedly sculptured at 10–15X, each face with 23–37 rows of transversely elongated cells, the longitudinal walls separating the cells often prominent, apex with short neck 0.7–0.8 mm wide. Tubercles dark brown, lamelliform, slightly higher than wide, 0.7–1.1 × 0.5–0.7 mm. [details]

Taxonomic remark Source in seed data: wcs Update namepublishedIn from Syst. Veg., ed. 15 bis [Roemer & Schultes] 2: 149. 1817 [Nov 1817] to Syst. Veg., ed. 15 bis 2: 149 (1817), information provided by Alan E. on email Jun. 07 2021 More details could be found in [details]
LanguageName 
English knotted spike rush  [details]
To Barcode of Life 
To Biodiversity Heritage Library (15 publications) (from synonym Limnochloa articulata Nees)
To Biodiversity Heritage Library (156 publications) 
To Biodiversity Heritage Library (16 publications) (from synonym Eleocharis articulata Kunth)
To Biodiversity Heritage Library (2 publications) (from synonym Eleocharis obsoleta (Nees) Steud.)
To Biodiversity Heritage Library (2 publications) (from synonym Limnochloa obsoleta Nees)
To Biodiversity Heritage Library (2 publications) (from synonym Trichophyllum interstinctum (Vahl) House)
To Biodiversity Heritage Library (57 publications) (from synonym Scirpus interstinctus Vahl)
To Biodiversity Heritage Library (7 publications) (from synonym Eleocharis septata Miq.)
To Biodiversity Heritage Library (7 publications) (from synonym Eleocharis cognata Steud.)
To Biodiversity Heritage Library (78 publications) (from synonym Scirpus plantagineus Hance)
To Biodiversity Heritage Library (78 publications) (from synonym Scirpus plantagineus Sw.)
To Biodiversity Heritage Library (90 publications) (from synonym Eleocharis plantaginea Boeckeler)
To European Nucleotide Archive, ENA (Eleocharis interstincta) 
To Field Museum Herbarium (Eleocharis articulata Lindl. & Nees ex Nees photographed at B type [status unknown] 1) (from synonym Eleocharis articulata Kunth)
To GenBank (73 nucleotides; 38 proteins) 
To International Plant Names Index (IPNI) 
To International Plant Names Index (IPNI) (from synonym Eleocharis articulata Kunth)
To International Plant Names Index (IPNI) (from synonym Eleocharis cognata Steud.)
To International Plant Names Index (IPNI) (from synonym Eleocharis obsoleta (Nees) Steud.)
To International Plant Names Index (IPNI) (from synonym Limnochloa obsoleta Nees)
To International Plant Names Index (IPNI) (from synonym Scirpus interstinctus Vahl)
To International Plant Names Index (IPNI) (from synonym Eleocharis septata Miq.)
To International Plant Names Index (IPNI) (from synonym Limnochloa articulata Nees)
To International Plant Names Index (IPNI) (from synonym Eleocharis plantaginea Boeckeler)
To International Plant Names Index (IPNI) (from synonym Scirpus plantagineus Sw.)
To International Plant Names Index (IPNI) (from synonym Trichophyllum interstinctum (Vahl) House)
To IUCN Red List (Least Concern) 
To NHMUK collection (Eleocharis interstincta (Vahl) Roem. & Schult.; NHMUK:ecatalogue:9148202) 
To Plants of the World Online 
To Plants of the World Online (from synonym Eleocharis articulata Kunth)
To Plants of the World Online (from synonym Eleocharis obsoleta (Nees) Steud.)
To Plants of the World Online (from synonym Eleocharis cognata Steud.)
To Plants of the World Online (from synonym Limnochloa obsoleta Nees)
To Plants of the World Online (from synonym Limnochloa articulata Nees)
To Plants of the World Online (from synonym Eleocharis septata Miq.)
To Plants of the World Online (from synonym Scirpus interstinctus Vahl)
To Plants of the World Online (from synonym Trichophyllum interstinctum (Vahl) House)
To Plants of the World Online (from synonym Scirpus plantagineus Sw.)
To Plants of the World Online (from synonym Eleocharis plantaginea Boeckeler)
To The Plant List (from synonym Scirpus plantagineus Hance)
From editor or global species database
Unreviewed
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