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This species is accepted, and its native range is E. Central & E. Tropical African Mountains.

[FTEA]

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

Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 3.
Morphology Reproductive morphology Flowers Androecium Stamens Filaments
Filaments 2.8–5 mm long.
Morphology Reproductive morphology Flowers Androecium Stamens Anthers
Anthers 1.1–1.2 mm long
Morphology Reproductive morphology Fruits
Nutlet brown, trigonous, 1.5–3 mm long, 0.6–0.8 mm wide, minutely papillose.
Ecology
In woodland; 1850–3050 m
Conservation
Least Concern (LC) due to the altitude range?
Note
Kükenthal and Lye recognize var. karisimbiensis and var. longinux; not enough specimens were seen to be able to see much difference. These varieties are not recognized here.
Type
Type: Rwanda, Karisimbi Vulcano, Humbert 8587 (B!, BR!, P!, syn.) & Uganda, Kigezi District: between Sabinyo Vulcano and Mgahinga Vulcano, Humbert 8643 (P!, syn.); note Haines & Lye state the type is Humbert 8587, which might be taken as a lectotypification
Morphology General Habit
Perennial, tussocky, up to 48 cm tall, with a slightly swollen culm base covered by thin grey to brown leaf sheaths, the oldest sometime splitting into soft fibres.
Morphology Culms
Culms few, 13–46 cm long, 0.8–1.5 mm wide, trigonous, glabrous
Morphology Leaves
Leaves many, up to 55 cm long. Leaf sheath grey to brown, 6–11.5 cm long, the upper ones rather thin and membranous, the lower and dead ones only slightly thicker. Leaf blade linear, flat, 10–46 cm long, 1–2.5 mm wide, scabrid at least on margin and primary vein, apex acuminate
Morphology Reproductive morphology Inflorescences Bracts
Involucral bracts leaf-like, spreading to erect, 3–4, lowermost 8–20 cm long, 1.5–3 mm wide
Morphology Reproductive morphology Inflorescences
Inflorescence capitate.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets in a solitary hemispherical or irregular head, many per head, lanceolate, 4.4–7.3 mm long, 0.8–1.5 mm wide, 3–6flowered and usually perfecting 2–3 nutlets.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes pinkish white to darkish redbrown, lanceolate, 3.1–4.9 mm long, 1.5–1.7 mm wide, keel slender with 5–8 distinctive but narrow veins on either side, occasionally with a dark reddish brown central patch, apex acute
Distribution
Flora districts: U2 K 3/ K4 T2 Range: Congo-Kinshasa, Rwanda

Native to:

Kenya, Rwanda, Tanzania, Uganda, Zaïre

Cyperus karisimbiensis (Cherm.) Kük. appears in other Kew resources:

First published in H.G.A.Engler (ed.), Pflanzenr., IV, 20(101): 559 (1936)

Accepted by

  • 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

Flora of Tropical East Africa

  • E.P. 4, 20 (101): 559 (1936)
  • Haines & Lye, Sedges & Rushes E. Afr.: 221, fig. 448 (1983).

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