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This species is accepted, and its native range is Tropical & S. Africa to Tropical Asia.
Cyperus dubius Rottb.

[FSOM]

M. Thulin et al. Flora of Somalia, Vol. 1-4 [updated 2008] https://plants.jstor.org/collection/FLOS

Morphology General Habit
Tussocky perennial with many crowded stems and leaves
Morphology Stem
Stems 8–40 cm long and 0.5–2 mm thick (the lower part is thicker when fresh), triangular, glabrous; base thick and bulbous
Morphology Leaves
Leaves many, 5–30 cm long and 1.5–3.5 mm wide, flat and rather thick, scabrid at least on margin and midrib; upper sheaths grey, thin and membranous, the lower somewhat thicker, brown and occasionally splitting up into fibres
Morphology Reproductive morphology Inflorescences
Inflorescence a solitary greenish white or dirty white head hemispherical or irregular in outline, 5–15 mm in diam., usually composed of 3–6 sessile congested spikes; involucral bracts 3–6, usually erect or spreading, the largest 4–15 cm long and 0.5–3.5 mm wide
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets 2–5 x 1–2 mm, lanceolate, 3–6-flowered, usually densely clustered; rhachilla winged
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes 2–2.5 mm long, ovate, strongly concave, greenish with an uncoloured margin and 5–8 slender nerves on each side of the narrow midrib
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 2–3
Morphology Reproductive morphology Flowers Gynoecium Style
Style with 3 branches
Morphology Reproductive morphology Fruits
Nutlet 1.2–1.4 mm long including a 0.1–0.2 mm long apiculus and 0.8–0.9 mm wide, obovate, triangular, brown with dark brown angles, strongly papillose.
Distribution
N1 widespread in tropical Africa and Asia.
Ecology
Altitude probably 1000–1500 m.

[FTEA]

Cyperaceae, K Hoenselaar, B. Verdcourt & H. Beentje. Hypolytrum, D Simpson. Fuirena, M Muasya. Flora of Tropical East Africa. 2010

Type
Type: India, König s.n. (C, holo.; photo!)
Morphology General Habit
Perennial with tufted culms up to 45 cm tall, with a bulbous culm-base.
Morphology Culms
Culms many, crowded, sometimes semi-succulent, 8–40 cm long, 0.5–2 mm wide, bluntly to sharply triangular, glabrous.
Morphology Roots
Roots fragrant (fide Hooper 928)
Morphology Leaves
Leaves many, up to 33 cm long, often recurved. Leaf blade bright green or glaucous in very dry situations, linear, flat or slightly v-shaped, 5–33 cm tall, 1–4(–5) mm wide, scabrid on at least margin and primary vein, apex attenuate Leaf sheath pale brown, thin and membranous, the lower somewhat thicker, brown and occasionally splitting up into fibres, to 4 cm long.
Morphology Reproductive morphology Inflorescences Bracts
Involucral bracts leaf-like, erect to spreading, 3–6, lowermost 4–23 cm long, 0.5–3.5 mm wide
Morphology Reproductive morphology Inflorescences
Inflorescence capitate, green or greenish white or white tinged green, hemispherical to ovoid, 5–15 mm in diameter, of 3–6 congested sessile spikes.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets narrowly ovoid, 2–6 mm long, 1–2 mm wide, 3–9(–18)-flowered but with only few maturing nutlets.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes greenish with uncoloured margin, ovate, 2–3 mm long, keel narrow, with 5–8 slender veins on either side, apex concave
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 2–3, with white filaments and yellow anthers.
Morphology Reproductive morphology Flowers Gynoecium Style
Style white
Morphology Reproductive morphology Fruits
Nutlet brown with dark brown angles, obovoid, trigonous, 1.2–1.4 mm long, (including 0.1–0.2 mm long apiculus), 0.8–0.9 mm wide, strongly papillose.

Native to:

Aldabra, Angola, Assam, Bangladesh, Benin, Borneo, Botswana, Burundi, Cambodia, Cameroon, Cape Provinces, Central African Repu, Chagos Archipelago, Comoros, Congo, Equatorial Guinea, Eritrea, Ethiopia, Gabon, Ghana, Guinea, Gulf of Guinea Is., Hainan, India, Ivory Coast, Jawa, Kenya, KwaZulu-Natal, Laccadive Is., Laos, Liberia, Madagascar, Malawi, Malaya, Maldives, Mauritius, Mozambique, Mozambique Channel I, Namibia, Nigeria, Northern Provinces, Oman, Philippines, Rodrigues, Rwanda, Réunion, Seychelles, Somalia, Sri Lanka, Sudan, Sumatera, Swaziland, Tanzania, Thailand, Togo, Uganda, Vietnam, Yemen, Zambia, Zaïre, Zimbabwe

Introduced into:

New South Wales

Cyperus dubius Rottb. appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Aug 1, 1996 Parnell [95-345], Thailand K000467868
May 20, 1977 Röttler, J.P. [s.n.], India K000592553 Unknown type material
Jun 4, 1966 s.coll. [s.n.], India K000309424 holotype
Jul 1, 1891 Koenig, J.G. [s.n.], India K000592554 Unknown type material
Cuming, H. [2372], Peninsular Malaysia K000290879 Unknown type material
Griffiths or Lemann? [s.n.], Peninsular Malaysia K000290880 Unknown type material
Griffith or Lemann? [s.n.], India K000290881
Krauss [6], South Africa K000362920 Unknown type material
Krauss [6], South Africa K000362921 Unknown type material
Bidgood, S. [6290], Tanzania K000468135
Bidgood, S. [6015], Tanzania K000468410
Kerr, A.F.G. [14089], Thailand K000467853
Kerr, A.F.G. [14385], Thailand K000467856
Kerr, A.F.G. [12690], Thailand K000467857
Kerr, A.F.G. [10724], Thailand K000467858
Larsen, K. [3198], Thailand K000467861
Middleton, D.J. [1167], Thailand K000467865
Middleton, D.J. [1310], Thailand K000467866
Chantaranothai, P. [90/65a], Thailand K000467867
Smitinand, T. [5978], Thailand K000467860
Kerr, A.F.G. [4232], Thailand K000467855
Phengnaren, S. [392], Thailand K000467864
Tagawa, M. [8658], Thailand K000467863
Kerr, A.F.G. [11241], Thailand K000467851
Kerr, A.F.G. [21426], Thailand K000467850
Kerr, A.F.G. [2043], Thailand K000467854
Put [3056], Thailand K000467852
Larsen, L. [3198], Thailand K000467859
Kerr, A.F.G. [15696], Thailand K000467862

First published in Descr. Icon. Rar. Pl.: 20 (1773)

Accepted by

  • Akoègninou, A., van der Burg, W.J. & van der Maesen, L.J.G. (eds.) (2006). Flore Analytique du Bénin: 1-1034. Backhuys Publishers.
  • Balkrishna, A. (2018). Flora of Morni Hills (Research & Possibilities): 1-581. Divya Yoga Mandir Trust.
  • Browning, J. & al. (2020). Flora Zambesiaca 14: 1-455. Royal Botanic Gardens, Kew.
  • Cabezas, F., Aedo, C. & Velayos, M. (2004). Checklist of the Cyperaceae of Equatorial Guinea (Annobón, Bioko, Río Muni) Belgian Journal of Botany 137: 3-26.
  • Figueiredo, E. & Smith, G.F. (2008). Plants of Angola Strelitzia 22: 1-279. National Botanical Institute, Pretoria.
  • Govaerts, R. & Simpson, D.A. (2007). World Checklist of Cyperaceae. Sedges: 1-765. The Board of Trustees of the Royal Botanic Gardens, Kew.
  • Govaerts, R. (1999). World Checklist of Seed Plants 3(1, 2a & 2b): 1-1532. MIM, Deurne.
  • Hoenselaar, K., Verdcourt, B. & Beentje, H. (2010). Cyperaceae Flora of Tropical East Africa: 1-466.
  • Lye, K.A. & Thery, P. (2012). Flore du Gabon 44: 1-230. Muséum National D'Histoire Naturelle, Paris.
  • Marais, W. & Araujo, A.C. (2018). Flore des Mascareignes 202: 1-99. IRD Éditions, MSIRI, RBG-Kew, Paris.
  • Middleton, D.J. & al. (eds.) (2019). Flora of Singapore 7: 1-525. Singapore Botanic Gardens.
  • Mostaph, M.K. & Uddin, S.B. (2013). Dictionary of plant names of Bangladesh, Vasc. Pl.: 1-434. Janokalyan Prokashani, Chittagong, Bangladesh.
  • Velayos, M., Aedo, C., Cabezas, F., de la Estrella, M., Barberá, P. & Fero, M. (eds.) (2014). Flora de Guinea Ecuatorial 11: 1-416. Consejo superior de investigaciones científicas, Real jardín botánico, Madrid.
  • Wu, Z. & Raven, P.H. (eds.) (2010). Flora of China 23: 1-515. Missouri Botanical Garden Press, St. Louis.

Not accepted by

  • Sosef, M.S.M. & al. (2006). Check-list des plantes vasculaires du Gabon Scripta Botanica Belgica 35: 1-438. [Cited as Mariscus dubius.]

Literature

Kew Backbone Distributions

  • Ananda Rao, T. & Ellis, J.L. (1995). Flora of Lakshadweep islands off the Malabar coast, peninsular India, with emphasis on phytogeographical distribution of plants Journal of Economic and Taxonomic Botany 19: 235-250.
  • Boulvert, Y. (1977). Catalogue de la Flore de Centrafrique 2(2): 1-94. ORSTOM, Bangui.
  • Browning, J. & al. (2020). Flora Zambesiaca 14: 1-455. Royal Botanic Gardens, Kew.
  • Brunel, J.F., Hiepo, P. & Scholz, H. (eds.) (1984). Flore Analytique du Togo Phanérogames: 1-751. GTZ, Eschborn.
  • Cabezas, F., Aedo, C. & Velayos, M. (2004). Checklist of the Cyperaceae of Equatorial Guinea (Annobón, Bioko, Río Muni) Belgian Journal of Botany 137: 3-26.
  • Chou, S., Chhnang, P. & Kim, Y. (2016). A Checklist for the Seed Plants of Cambodia: 1-272. National Institute of Biological Resources, Korea.
  • Figueiredo, E. & Smith, G.F. (2008). Plants of Angola Strelitzia 22: 1-279. National Botanical Institute, Pretoria.
  • Fosberg, F.R. (1957). The Maldive islands, Indian Ocean Atoll Research Bulletin 58: 1-37.
  • Hoenselaar, K., Verdcourt, B. & Beentje, H. (2010). Cyperaceae Flora of Tropical East Africa: 1-466.
  • Middleton, D.J. & al. (eds.) (2019). Flora of Singapore 7: 1-525. Singapore Botanic Gardens.
  • Mostaph, M.K. & Uddin, S.B. (2013). Dictionary of plant names of Bangladesh, Vasc. Pl.: 1-434. Janokalyan Prokashani, Chittagong, Bangladesh.
  • Sita, P. & Moutsambote, J.-M. (2005). Catalogue des plantes vasculaires du Congo, ed. sept. 2005: 1-158. ORSTOM, Centre de Brazzaville.
  • Sosef, M.S.M. & al. (2006). Check-list des plantes vasculaires du Gabon Scripta Botanica Belgica 35: 1-438.
  • Wu, Z. & Raven, P.H. (eds.) (2010). Flora of China 23: 1-515. Missouri Botanical Garden Press, St. Louis.

Flora of Somalia

  • Flora Somalia, Vol 4, (1995) Author: by K. A. Lye [updated by M. Thulin 2008]

Flora of Tropical East Africa

  • Descr. Icon. Rar. Pl.: 20, t. 4 fig. 5 (1773)
  • E.P. IV, 20 (101): 563 (1936)
  • Fl. Eth. 6: 468 (1997).
  • Fl. Somalia 4: 139 (1995)

Flora of Somalia
Flora of Somalia
http://creativecommons.org/licenses/by-nc-sa/3.0

Flora of Tropical East Africa
Flora of Tropical East Africa
http://creativecommons.org/licenses/by-nc-sa/3.0

Herbarium Catalogue Specimens
Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/3.0/

Kew Backbone Distributions
The International Plant Names Index and World Checklist of Selected Plant Families 2021. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0

Kew Names and Taxonomic Backbone
The International Plant Names Index and World Checklist of Selected Plant Families 2021. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0

Plants and People Africa
Common Names from Plants and People Africa http://www.plantsandpeopleafrica.com/
© Plants and People Africa http://www.plantsandpeopleafrica.com http://creativecommons.org/licenses/by/3.0/