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This species is accepted, and its native range is Tropical & S. Africa.

[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, Zeyher 13 (B, holo.)
Morphology General Habit
Perennial, densely tufted, up to 73 cm tall, with an erect rhizome covered by old leaf bases.
Morphology Culms
Culms tufted, 5–68 cm long, 0.6–1.8 mm wide, rounded, glabrous
Morphology Leaves
Leaf sheath straw-coloured to purple, 1.5–7 cm long. Leaves up to 33 cm long. Leaf blade linear, flat or folded, 5–30 cm long, 1.1–4 mm wide, scabrid on margins and primary vein at least on young leaves, apex acuminate
Morphology Reproductive morphology Inflorescences Bracts
Involucral bracts leaf-like, spreading, the lowermost (1–)3–14 cm long, 1.2–2 mm wide
Morphology Reproductive morphology Inflorescences
Inflorescence a simple to compound anthela, primary branches 3–12, 0.5–5 cm long.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets in digitate, sessile and at the end of primary and sometimes secondary branches, 5–14 per cluster, linear, 3–19.1 mm long, 0.7–1.3 mm wide, up to 2.5 mm wide with glumes spreading, rachilla straight.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes falling off with nutlet Glumes pale reddish-brown to almost black, ovate, 1.2–2.3 mm long, 0.8–1.3 mm wide, keel 3veined, apex obtuse to slightly mucronate.
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 3: filaments 2–2.1 mm long.
Morphology Reproductive morphology Flowers Androecium Stamens Anthers
Anthers 1.2–1.9 mm long
Morphology Reproductive morphology Fruits
Nutlet yellowish-brown when young, dark grey with metallic shine when mature, narrowly obovoid to ellipsoid, 0.7–1.1 mm long, 0.3–0.4 mm wide, minute tubercles in longitudinal rows
Ecology
Seasonally flooded grassland, swampy grassland, mangrove edge, woodland; sea-level to 1550 m
Conservation
Least Concern (LC) due to its wide distribution
Note
This species has a very leafy culm base, and is easy to recognize with the narrow long spikelets. The colour of the glumes is highly variable. In the past two varieties have been described based on colour, and glumes in the darker specimens are more open and spreading, and occur more inland. Too many intermediate specimens exist and the varieties are not upheld here.
Distribution
Range: Sierra Leone, Liberia, Ivory Coast, Benin, Nigeria, Equatorial Guinea, Gabon, Congo-Kinshasha, Angola, Malawi, Zimbabwe, South Africa Flora districts: U4 K4 K7 T1 T3 T4 T5 T6 T7 T8 ZP

[FWTA]

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

Morphology General Habit
Densely tufted plant
Morphology Leaves Leaf sheaths
Hard, persistent leaf-sheaths
Morphology Reproductive morphology Inflorescences
A compact inflorescence of short rays bearing spherical spikes of dark, obtuse spikelets
Ecology
Sandy places.

Native to:

Angola, Benin, Cape Provinces, Congo, Equatorial Guinea, Free State, Gabon, Ivory Coast, Kenya, KwaZulu-Natal, Liberia, Malawi, Mozambique, Namibia, Nigeria, Northern Provinces, Sierra Leone, Tanzania, Uganda, Zambia, Zaïre, Zimbabwe

Cyperus tenax Boeckeler appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Thomas, D.W. [9791], Cameroon K000381386

First published in Linnaea 35: 504 (1868)

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.
  • 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.
  • 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.
  • 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.
  • 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.

Literature

Flora of West Tropical Africa

  • F.T.A. 8: 334
  • Kük. in Engl., Pflanzenr. Cyper. 259. incl. var. monroviensis (Boeck.) Kük. (1936)
  • Melmes & Baldwin in Amer. J. Bot. 39: 383 (1952).
  • in Linnaea 35: 504 (1868)

Kew Backbone Distributions

  • 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.
  • 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.

Flora of Tropical East Africa

  • E.P. 4, 20 (101): 259 (1936)
  • F.T.A. 8: 334 (1902)
  • Haines & Lye, Sedges & Rushes E. Afr.: 267, figs. 546, 547 (1983).
  • Linnaea 35: 504 (1868)

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

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