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This species is accepted, and its native range is Tropical & Subtropical Old World to Central Asia.
A specimen from Kew's Herbarium

[FSOM]

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

Morphology General Habit
Slender annual with few–many stems and a small root system
Morphology Stem
Stems 5–20 cm long and 0.5–1.5 mm thick, triangular or 6-angular, green, glabrous
Morphology Leaves
Leaf-blades present, usually short, up to 10 cm long and 0.5–3 mm wide; leaf-sheaths light reddish brown to purple, glabrous
Morphology Reproductive morphology Inflorescences
Inflorescence an open anthela 3–10 cm in diam.; major involucral bract leafy, 2–10 cm long, usually longer than the inflorescence; largest inflorescence-branches 0.5–5 cm long, carrying 1 sessile and several stalked groups of digitately arranged spikelets
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets 2–12 x 0.8–1.3 mm, linear-lanceolate, green or reddish brown
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes 1–1.3 mm long, truncate, reddish brown with a paler midrib excurrent in a short recurved mucro
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 2
Morphology Reproductive morphology Flowers Gynoecium Style
Style 3-branched
Morphology Reproductive morphology Fruits
Nutlet 0.4–0.5 x 0.25–0.3 mm, obovate, whitish or pale brown with large rectangular surface cells with raised cell-walls.
Distribution
S2, 3 widespread in the Old World tropics.
Ecology
Altitude below 100 m.

[FTEA]

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

Type
Type: India, Mangalore, Hohenacker 1607 (P, holo.; K!, M!, iso.)
Morphology General Habit
Annual, up to 30 cm tall, small rootsystem.
Morphology Culms
Culms few or several, 10–22 cm long, 0.2–1 mm wide, trigonous to 6-angular, glabrous
Morphology Leaves
Leaf sheath pale reddish brown to dark brown, 1–4.5 cm long. Leaves up to 18.5 cm long. Leaf blade linear, flat, 6.5–14 cm long, 1.3–8 mm wide, glabrous, apex acute to acuminate
Morphology Reproductive morphology Inflorescences Bracts
Involucral bracts leaf-like, spreading, 3–5, lowermost 5–14 cm long, 1–8 mm wide
Morphology Reproductive morphology Inflorescences
Inflorescence simple to compound, primary branches 1–8, 1–9.5 cm long.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets in digitate clusters at the end of primary branches, 2–4 per cluster, linear-lanceolate, 5.3–9.5 mm long, 1.3–1.9 mm wide.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes red-brown, sometimes with a paler margin, ovatetruncate, 1.1–1.4 mm long, 0.6–1 mm wide, keel excurrent, apex (shortly) mucronate
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 2–3.
Morphology Reproductive morphology Flowers Androecium Stamens Filaments
Filaments 0.7–1.2 mm long
Morphology Reproductive morphology Fruits
Nutlet whitish to pale brown, rounded to obovoid, trigonous, 0.5–0.6 mm long, 0.3–0.5 mm wide, large rectangular surface cells with raised cell-walls
Ecology
In seasonally wet habitats, swamps, rice fields; 0–1750 m
Conservation
Least Concern due to its wide distribution and common habitat
Note
Often confused with C. haspan and foliaceus; from the first it is distinct by being very short-lived (‘annual’) and the lack of rhizomes; from the second it has traditionally been distinguished by number of stamens (2 rather than 3 and nutlet smooth rather than tuberculate), but I (HB) have found these characters too variable; I believe the easiest difference is the more slender habit, with the involucral bract being filiform, whereas in C. foliaceus it is consistently leaf-like and more than 4 mm wide. Several specimens called C. tenuispica under this regime have 3 stamens, however (including Milne-Redhead & Taylor 9959 & 10478, Faden et al. 96/220 and Hooper & Townsend 2006). Specimens with slightly wider involucral bracts such as Langdale-Brown 2137 have 2 stamens.. I am not happy with the distinction between the two taxa, or how to distinguish between them. The type of foliaceus certainly has wide involucral bracts, and 2 stamens in many flowers.
Distribution
Flora districts: U4 T4 T6 T8 Range: Widespread in tropical Africa and South Africa; India

[FWTA]

Cyperaceae, Miss S. S. Hooper. Flora of West Tropical Africa 3:2. 1972

Morphology General Habit
Weak annual 10–60 cm. high
Morphology Leaves
Flaccid leaves
Morphology Reproductive morphology Inflorescences
A diffuse inflorescence with rays often as long as the weak angular stems, and neat elliptical spikelets often 2 or 8 together
Ecology
Rice fields, marshy savanna and other damp places.

Native to:

Andaman Is., Angola, Assam, Bangladesh, Benin, Botswana, Burkina, Cambodia, Cameroon, Central African Repu, Chad, China North-Central, China South-Central, China Southeast, East Himalaya, Ethiopia, Ghana, Guinea, Guinea-Bissau, Hainan, Ivory Coast, Japan, Jawa, Kazan-retto, Korea, KwaZulu-Natal, Laos, Lesser Sunda Is., Liberia, Malawi, Malaya, Mali, Mauritania, Mozambique, Myanmar, Namibia, Nansei-shoto, Nepal, Niger, Nigeria, Northern Provinces, Northern Territory, Ogasawara-shoto, Pakistan, Philippines, Primorye, Queensland, Rwanda, Senegal, Seychelles, Sierra Leone, Somalia, Sri Lanka, Sudan, Sulawesi, Sumatera, Tadzhikistan, Taiwan, Tanzania, Thailand, Tibet, Togo, Uganda, Uzbekistan, Vietnam, West Himalaya, Western Australia, Zambia, Zaïre, Zimbabwe

Introduced into:

Brazil West-Central, Costa Rica, Guyana, Venezuela

Cyperus tenuispica Steud. appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Jan 1, 2013 Wardi et al. [BOHK 434], Indonesia K000734702
Jan 25, 2002 Chayamarit, K. [2545], Thailand K000467488
May 1, 2001 Pollard, B.J. [141], Cameroon K000050664
Jan 1, 1974 Kerr, A.F.G. [3835], Thailand K000467483
Jan 1, 1974 Kerr, A.F.G. [3835], Thailand K000467484
Put [2144], Thailand K000467485
Chantaranothai, P. [1608], Thailand K000467486
Middleton, D. [1200], Thailand K000467489
Niyomdham, C. et al [1121], Thailand K000467481
Larsen, K. [8421], Thailand K000467482
Chantaranothai, P. [1747], Thailand K000467487
Thomson, G. [49], India K000592539 Unknown type material

First published in Syn. Pl. Glumac. 2: 11 (1854)

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.
  • Barry, J. P. & Celles, J.S. (1991). Flore de Mauritanie 2: 360-550. Centre Regional de Documentation Pedagogique, Nice.
  • 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.
  • Catarino, L., Sampaio Martins, E., Pinto-Basto, M.F. & Diniz, M.A. (2006). Plantas Vasculares e Briófitos da Guiné-Bissau: 1-298. Instituto de investigação científica tropical, Instituto Português de apoio ao desenvolvimento.
  • Chang, C.S., Kim, H. & Chang, K.S. (2014). Provisional checklist of vascular plants for the Korea peninsula flora (KPF): 1-660. DESIGNPOST.
  • Darbyshire, I., Kordofani, M., Farag, I., Candiga, R. & Pickering, H. (eds.) (2015). The Plants of Sudan and South Sudan: 1-400. Kew publishing, Royal Botanic Gardens, Kew.
  • Edwards, S., Demissew, S., & Hedberg, I. (eds.) (1997). Flora of Ethiopia and Eritrea 6: i-xxviii, 1-586. The National Herbarium, Addis Ababa University, Ethiopia & The Department of Systematic Botany, Upps.
  • 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.
  • Hammel, B.E. & al. (2003). Manual de Plantas de Costa Rica 2: 1-694. Missouri Botanical Garden Press, St. Louis.
  • Hoenselaar, K., Verdcourt, B. & Beentje, H. (2010). Cyperaceae Flora of Tropical East Africa: 1-466.
  • Hokche, O., Berry, P.E. & Huber, O. (eds.) (2008). Nuevo Catálogo de la Flora Vascular de Venezuela: 1-859. Fundación Instituto Botánico de Venezuela.
  • Kozhevnikov, A.E. & Kozhevnikova, Z.V. (2010). Cyperus tenuispica (Cyperaceae), a new species to the flora of Russia Botanicheskii Zhurnal. Moscow & Leningrad 95: 1488-1491.
  • 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.
  • Pandey, R.P. & Dilwakar, P.G. (2008). An integrated check-list flora of Andaman and Nicobar islands, India Journal of Economic and Taxonomic Botany 32: 403-500.
  • Thiombiano, A., Schmidt, M., Dressler, S., Ouédraogo, A., Hahn, K. & Zizka, G. (2012). Catalogue des plantes vasculaires du Burkina Faso Boissiera 65: 1-391.
  • Wu, Z. & Raven, P.H. (eds.) (2010). Flora of China 23: 1-515. Missouri Botanical Garden Press, St. Louis.

Literature

Flora of West Tropical Africa

  • Berhaut, Fl. Sén. ed. 2, 381 (1967).
  • Cherm. in Arch. Bot. Caen 7, Mém. 4: 8 (1936)
  • Kük. in Engl., Pflanzenr. Cyper. 245 (1936)
  • Syn. Pl. Glum. 2: 11 (1855)

Kew Backbone Distributions

  • Akoègninou, A., van der Burg, W.J. & van der Maesen, L.J.G. (eds.) (2006). Flore Analytique du Bénin: 1-1034. Backhuys Publishers.
  • Barry, J. P. & Celles, J.S. (1991). Flore de Mauritanie 2: 360-550. Centre Regional de Documentation Pedagogique, Nice.
  • 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.
  • Kozhevnikov, A.E. & Kozhevnikova, Z.V. (2010). Cyperus tenuispica (Cyperaceae), a new species to the flora of Russia Botanicheskii Zhurnal. Moscow & Leningrad 95: 1488-1491.
  • Mostaph, M.K. & Uddin, S.B. (2013). Dictionary of plant names of Bangladesh, Vasc. Pl.: 1-434. Janokalyan Prokashani, Chittagong, Bangladesh.
  • Pandey, R.P. (2009). Floristic diversity of Ferrargunj forest area in South Andaman Journal of Economic and Taxonomic Botany 33: 747-768.
  • Thiombiano, A., Schmidt, M., Dressler, S., Ouédraogo, A., Hahn, K. & Zizka, G. (2012). Catalogue des plantes vasculaires du Burkina Faso Boissiera 65: 1-391.
  • Wu, Z. & Raven, P.H. (eds.) (2010). Flora of China 23: 1-515. Missouri Botanical Garden Press, St. Louis.
  • Yan, Y. (ed.) (2012). Research materials of Cyperaceae in China: 1-128. China Scientific Book Services, Beijing.

Flora of Somalia

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

Flora of Tropical East Africa

  • E.P. 4, 20 (101): 245 (1936)
  • Fl. Eth. 6: 437 (1997).
  • Fl. Somalia 4: 119 (1995)
  • Haines & Lye, Sedges & Rushes E. Afr.: 167, figs. 313, 314 (1983)
  • Syn. Pl. Glum. 2: 11 (1854)

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

Flora of West Tropical Africa
Flora of West Tropical 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