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This species is accepted, and its native range is Ethiopia to S. Africa.
Cyperus usitatus Burch. ex Roem & Schult

[FTEA]

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

Type
Type: South Africa, Cape of Good Hope, Vyentjes, Burchell s.n. (ubi?)
Morphology General Habit
Perennial, slender, up to 44 cm tall, producing thin stolons and small bulbs from the stolons.
Vegetative Multiplication Stolons
Stolons 0.5–10 cm long, 0.2–1 mm in diameter, covered in light reddishbrown scales, sometimes fibrous; bulbs 5–10 mm in diameter.
Morphology Culms
Culms few, 5–42 cm long, 1–3.8 mm wide, triquetrous to trigonous, smooth
Morphology Leaves
Leaves up 30 cm long. Leaf blade linear, flat, rather thick and sometimes semi-fleshy, shrivelling when dry, 3.5–25 cm long, 1–3.8 mm wide, scabrid on margin at least above, apex acuminate Leaf sheath grey, straw-coloured to pale brown, 1–5.5 cm long.
Morphology Reproductive morphology Inflorescences Bracts
Involucral bracts leaflike, spreading, 2–4, lowermost 3–10 cm long, 0.6–2.5 mm wide, shape and surface as leaves
Morphology Reproductive morphology Inflorescences
Inflorescence more often (loosely) capitate then simple, when simple primary branches 0–2.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets in crowded digitate clusters, 7–25 to many more per cluster, linear, rachis straight, 8–21 mm long, 1.3–3.2 mm wide.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes golden brown to almost black, ovate-lanceolate to ovate, 3–6.4 mm long, 1.1–2.5 mm wide, keel sharp and slightly excurrent, with 3–9 ribs on either side, apex acuminate
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 3: filaments 2–5.1 mm long.
Morphology Reproductive morphology Flowers Androecium Stamens Anthers
Anthers 1.6–2.9 mm long
Morphology Reproductive morphology Fruits
Nutlet grey, reddish-brown to dark brown, ellipsoid-oblong to obovoid, trigonous, 1.3–1.6 mm long, 0.6–1 mm wide, apiculate, minutely tuberculate to minutely papillose in longitudinal rows.

Native to:

Angola, Botswana, Cape Provinces, Ethiopia, Free State, Kenya, KwaZulu-Natal, Lesotho, Namibia, Northern Provinces, Tanzania, Uganda, Zambia

Cyperus usitatus Burch. appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Aug 8, 1986 Burchell [2082], South Africa K000362719 Unknown type material
Mar 1, 1892 Burchell [1990], South Africa K000362720
Mar 1, 1892 Drege [s.n.], South Africa K000362724
Burchell [2684], South Africa K000362718
Wallich [1743], South Africa K000362722
McLea, J.H. [6013], South Africa K000362721
Nelson, W. [97x], South Africa K000362723

First published in J.A.Schultes, Mant. 2: 477 (1824)

Accepted by

  • 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.

Literature

Kew Backbone Distributions

  • Figueiredo, E. & Smith, G.F. (2008). Plants of Angola Strelitzia 22: 1-279. National Botanical Institute, Pretoria.

Flora of Tropical East Africa

  • E.P. 4, 20 (101): 122 (1936)
  • F.T.A. 8: 353 (1902)
  • Fl. Eth. 6: 452 (1997).
  • Haines & Lye, Sedges & Rushes E. Afr.: 192, fig. 376 (1983)
  • Mant. 2: 477 (1824)

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/