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This species is accepted, and its native range is South Sudan to E. Tropical African Mountains.

[FTEA]

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

Type
Type: Tanzania, Mt Kilimanjaro, Kersten s.n. (B, holo.)
Morphology General Habit
Perennial, robust, tussocky, up to 80 cm tall, with a swollen culm-base, covered by old brown leaf sheaths splitting up into fibres.
Morphology Culms
Culms few, 34–78 cm long, 1.8–2.2 mm wide, trigonous, glabrous
Morphology Leaves
Leaf blade linear, flat, rather thick, 35–51 cm long, 3–12 mm wide, strongly scabrid on margin and primary vein, apex acuminate Leaf sheath greyish-brown above, dark brown below, 6.5–12 cm long. Leaves up to 63 cm long.
Morphology Reproductive morphology Inflorescences Bracts
Involucral bracts leaf-like, spreading to reflexed, 2–3(–5), lowermost 22–36 cm long, 2.1–7 mm wide
Morphology Reproductive morphology Inflorescences
Inflorescence capitate, 15–20 mm long, 11–21 mm wide.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelet falling off entirely when mature. Spikelets lanceolate, 6.2–8 mm long, 1.5–2.1 mm wide, 2–4-flowered but often perfecting one nutlet only.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes dark reddish-brown, lanceolate, 2.5–5 mm long, 1.8–2.1 mm wide, keel rather slender, with 3–5 veins on either side, apex acute
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 3.
Morphology Reproductive morphology Flowers Androecium Stamens Filaments
Filaments 4–5.2 mm long.
Morphology Reproductive morphology Flowers Androecium Stamens Anthers
Anthers 1.6–2.7 mm long
Morphology Reproductive morphology Fruits
Nutlet reddish-brown, oblong, trigonous, 2.5–3 mm long, 0.7–0.9 mm wide, minutely papillose.
Ecology
Montane grassland, moorland and bogs, and next to streams; 2400–3600 m
Conservation
Least Concern (LC) due to altitude range and distribution within national parks
Note
The specimen from the Turkana region ( Thorold 2774) in Kenya is especially robust in habit.
Distribution
Flora districts: U1 U3 K2 K3 K4 T2 Range: Not known elsewhere

Native to:

Kenya, Sudan, Tanzania, Uganda

Cyperus kerstenii Boeckeler appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Agnew, A.D.Q. [11122], Kenya K000333797
Haines, R.W [168], Kenya K000333799
Thorold, C.A. [2774], Kenya K000333807
Smith, S.A.L. [194], Kenya K000333809
Hedberg, O. [4285], Kenya K000333802
Bally, J. [3233], Kenya K000333804
Lawton, R.M. [1723], Kenya K000333800
Bernardi, L. [9175], Kenya K000333803
James, E. [s.n.], Kenya K000333808
Agnew, A.D.Q. [7031], Kenya K000333798
Lawton, R.M. [1724], Kenya K000333801
Fries, C.E. [2523], Kenya K000333806
Mac Naughton [2829], Kenya K000333805

First published in Linnaea 36: 373 (1870)

Accepted by

  • 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.
  • 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

  • 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.

Flora of Tropical East Africa

  • E.P 4: 20 (101): 554 (1936)
  • Haines & Lye, Sedges & Rushes E. Afr.: 215, figs. 432, 433 (1983).
  • Linnaea 36: 373 (1870)

Flora of Tropical East Africa
Flora of Tropical East 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