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Cyperaceae taxon details

Cyperus cyperoides (L.) Kuntze

1680708 (urn:lsid:marinespecies.org:taxname:1680708)

accepted
Species
Cyperus thomensis (C.B.Clarke) Marais · unaccepted > heterotypic synonym
Scirpus cyperoides L. · unaccepted

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  1. Subspecies Cyperus cyperoides subsp. cyperinus (Retz.) Kük. accepted as Cyperus cyperinus (Retz.) Valck.Sur.
  2. Subspecies Cyperus cyperoides subsp. cyperoides accepted as Cyperus cyperoides (L.) Kuntze
  3. Subspecies Cyperus cyperoides subsp. flavus Lye accepted as Cyperus cyperoides (L.) Kuntze
  4. Subspecies Cyperus cyperoides subsp. macrocarpus (Kunth) Lye accepted as Cyperus macrocarpus (Kunth) Boeckeler
  5. Subspecies Cyperus cyperoides subsp. pseudoflavus (Kük.) Lye accepted as Cyperus pseudoflavus (Kük.) Lock
  6. Variety Cyperus cyperoides var. andersonianus (Boeckeler) Kük. accepted as Cyperus cyperinus (Retz.) Valck.Sur.
  7. Variety Cyperus cyperoides var. aureus Peter ex Kük. accepted as Cyperus cyperoides (L.) Kuntze
  8. Variety Cyperus cyperoides var. brevispicatus Kük. accepted as Cyperus cyperoides (L.) Kuntze
  9. Variety Cyperus cyperoides var. clarkei (Turrill ex Craib) Kük. accepted as Cyperus cyperoides (L.) Kuntze
  10. Variety Cyperus cyperoides var. evolutior (C.B.Clarke) Kük. accepted as Cyperus cyperoides (L.) Kuntze
  11. Variety Cyperus cyperoides var. khasianus (C.B.Clarke) Kük. accepted as Cyperus cyperoides (L.) Kuntze
  12. Variety Cyperus cyperoides var. microstachys Kük. accepted as Cyperus cyperoides (L.) Kuntze
  13. Variety Cyperus cyperoides var. nossibeensis (Steud.) Kük. accepted as Cyperus cyperoides (L.) Kuntze
  14. Variety Cyperus cyperoides var. ovalis Kük. accepted as Cyperus cyperoides (L.) Kuntze
  15. Variety Cyperus cyperoides var. polyphyllus Kük. accepted as Cyperus cyperoides (L.) Kuntze
  16. Variety Cyperus cyperoides var. repens Kük. accepted as Cyperus cyperoides (L.) Kuntze
  17. Variety Cyperus cyperoides var. subcompositus (C.B.Clarke) Kük. accepted as Cyperus cyperoides (L.) Kuntze
marine, brackish, fresh, terrestrial
recent only
Kuntze, O. (1898). Revisio Generum Plantarum. Part III. <em>Leipzig.</em> pp. [1]-576., available online at https://www.biodiversitylibrary.org/page/3551#page/2/mode/1up
page(s): 333 [details] 
Description Tufted perennial with short rhizome. Culms triquetrous, smooth, swollen at base, 20–75 cm high, 1–3 mm diam. Leaves not...  
Description Tufted perennial with short rhizome. Culms triquetrous, smooth, swollen at base, 20–75 cm high, 1–3 mm diam. Leaves not septate-nodulose, as long as culms or shorter, to 3.5 mm wide. Inflorescence usually simple, with 5–14 branches to 8 cm long; spikes cylindrical, 1.5–4 cm long, 6–10 mm diam., often covering half of the branch; involucral bracts leaf-like, 2–6 longer than inflorescence. Spikelets terete, numerous per spike, 1–3-flowered, mostly 1-flowered, with uppermost flower often male, 3–4 mm long, c. 0.5 mm wide; rachilla broadly winged; spikelet falling as unit. Glumes acute, with sides several-nerved, 3–3.5 mm long, whitish to pale brown, often yellow-tinged. Stamens 3. Style 3-fid. Nut trigonous, very narrow-ellipsoid, half to two-thirds as long as glume, 1.7–2.3 mm long, c. 0.5 mm diam., mid to dark brown. [details]

Description Perennials. Rhizomes short, hardened. Culms laxly tufted, 10-60 cm tall, acutely triquetrous, smooth, base swollen and with...  
Description Perennials. Rhizomes short, hardened. Culms laxly tufted, 10-60 cm tall, acutely triquetrous, smooth, base swollen and with more leaves. Leaves shorter than to equaling culm; sheath brown to reddish brown; leaf blade 3-6(-8) mm wide, folded at basal part but apically gradually flattened, margin not scabrous. Involucral bracts 5-8, obliquely spreading, leaflike, longer than inflorescence. Inflorescence a simple or subcompound anthela; rays several, 6-12 or sometimes more, short or 6-14 cm, unequal in length, each with 1-5 spikes. Spikes cylindric, 1-2.5[-5] cm × 5-10 mm or sometimes narrower, with many dense spikelets. Spikelets narrowly linear-ovoid, 3-7 × ca. 0.7 mm or sometimes shorter, spreading to reflexed, each (1 or)2- or 3-flowered; rachilla wings white, lanceolate, broad, hyaline. Glumes yellow, yellowish green, or greenish, oblong, ca. 3 mm, veins several with middle 3 green and conspicuous, margin involute, apex obtuse and not mucronate. Stamens 3; anthers broadly linear, 0.8-1 mm; connective prominent beyond anthers. Style short; stigmas 3, slender. Nutlet straw-colored at first but dark brown when mature, narrowly oblong, 1.8-2.2 × ca. 0.5 mm, ca. 2/3 as long as subtending glume, 3-sided, minutely punctate. Fl. and fr. Apr-Dec. 2n = 82, 88, 134, 220, 224. [details]
Cyperaceae Working Group. (2026). [see How to cite]. Global Cyperaceae Database. Cyperus cyperoides (L.) Kuntze. Accessed at: https://www.cyperaceae.org/aphia.php?p=taxdetails&id=1680708 on 2026-10-04
Date
action
by
2023-09-06 07:35:01Z
created
2024-12-10 11:47:54Z
unchecked
db_admin
2026-08-25 06:35:07Z
changed

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Nomenclature

original description Kuntze, O. (1898). Revisio Generum Plantarum. Part III. <em>Leipzig.</em> pp. [1]-576., available online at https://www.biodiversitylibrary.org/page/3551#page/2/mode/1up
page(s): 333 [details] 

original description (of Mariscus corymbosus Boeckeler) Böckeler, O. (1858). Neue Cyperaceen. <em>Flora.</em> 41(26): 409-420., available online at https://www.biodiversitylibrary.org/page/51454#page/410/mode/1up
page(s): 409 [details] 

original description (of Mariscus thomensis C.B.Clarke) Clarke, C. B. (1902). Cyperaceae. In: Thiselton-Dyer, W.T. (ed.), Flora of Tropical Africa,. Vol. 8 (Pt. 2): pp. 385-524. London: L. Reeve & Co., available online at https://www.biodiversitylibrary.org/page/379171#page/398/mode/1up
page(s): 395 [details] 

Other

additional source Li, B. Z.; Zhang, S. R. (2024). An updated species checklist and taxonomic synopsis of Cyperaceae in China. <em>Biodiversity Science.</em> 32(7): 24106., available online at https://doi.org/10.17520/biods.2024106 [details] Available for editors  PDF available [request]

 
 Present  Inaccurate  Introduced: alien  Containing type locality 
   

From editor or global species database
Description Tufted perennial with short rhizome. Culms triquetrous, smooth, swollen at base, 20–75 cm high, 1–3 mm diam. Leaves not septate-nodulose, as long as culms or shorter, to 3.5 mm wide. Inflorescence usually simple, with 5–14 branches to 8 cm long; spikes cylindrical, 1.5–4 cm long, 6–10 mm diam., often covering half of the branch; involucral bracts leaf-like, 2–6 longer than inflorescence. Spikelets terete, numerous per spike, 1–3-flowered, mostly 1-flowered, with uppermost flower often male, 3–4 mm long, c. 0.5 mm wide; rachilla broadly winged; spikelet falling as unit. Glumes acute, with sides several-nerved, 3–3.5 mm long, whitish to pale brown, often yellow-tinged. Stamens 3. Style 3-fid. Nut trigonous, very narrow-ellipsoid, half to two-thirds as long as glume, 1.7–2.3 mm long, c. 0.5 mm diam., mid to dark brown. [details]

Description Perennials. Rhizomes short, hardened. Culms laxly tufted, 10-60 cm tall, acutely triquetrous, smooth, base swollen and with more leaves. Leaves shorter than to equaling culm; sheath brown to reddish brown; leaf blade 3-6(-8) mm wide, folded at basal part but apically gradually flattened, margin not scabrous. Involucral bracts 5-8, obliquely spreading, leaflike, longer than inflorescence. Inflorescence a simple or subcompound anthela; rays several, 6-12 or sometimes more, short or 6-14 cm, unequal in length, each with 1-5 spikes. Spikes cylindric, 1-2.5[-5] cm × 5-10 mm or sometimes narrower, with many dense spikelets. Spikelets narrowly linear-ovoid, 3-7 × ca. 0.7 mm or sometimes shorter, spreading to reflexed, each (1 or)2- or 3-flowered; rachilla wings white, lanceolate, broad, hyaline. Glumes yellow, yellowish green, or greenish, oblong, ca. 3 mm, veins several with middle 3 green and conspicuous, margin involute, apex obtuse and not mucronate. Stamens 3; anthers broadly linear, 0.8-1 mm; connective prominent beyond anthers. Style short; stigmas 3, slender. Nutlet straw-colored at first but dark brown when mature, narrowly oblong, 1.8-2.2 × ca. 0.5 mm, ca. 2/3 as long as subtending glume, 3-sided, minutely punctate. Fl. and fr. Apr-Dec. 2n = 82, 88, 134, 220, 224. [details]
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