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

[FTEA]

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

Type
Type: Tanzania, Dodoma District: Saranda, Peter 33483 & Makutupora, Peter 33699a (B, syn.)
Morphology General Habit
Perennial, robust, up to 85 cm tall, with swollen fleshy culm-bases 0.8–1.3 cm in diameter.
Morphology Culms
Culms densely crowded in groups of 2–20, rarely solitary at the end of a stolon, 35–74 cm long, 1–3.1 mm wide, trigonous, hairy at least above
Morphology Leaves
Leaves up to 40 cm long. Leaf sheath pale brown to greyish, fleshy, 3–10.5 cm long. Leaf blade linear, flat, 14–32 cm long, 2.5–5.5 mm wide, hairy, apex acuminate
Morphology Reproductive morphology Inflorescences Bracts
Involucral bracts leaflike, erect to spreading, hairy, 2–3, lowermost 2.5–10 cm long, 2–5 mm wide
Morphology Reproductive morphology Inflorescences
Inflorescence a simple anthela, primary branches 3–8, 1.2–9.3 cm long. Spikes with 20 to many spikelets, sessile and at the end of primary branches, 1.3–2.5 cm long, 1.2–1.6 cm wide
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets linear-lanceolate, 5.9–9 mm long, 0.7–1.1 mm wide, falling off entirely when matured, rachis straight.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes pale brown, lanceolate-ovate, 2.9–3.8 mm long, 1–1.3 mm wide, densely hairy, keel green, apex somewhat recurved
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 3.
Morphology Reproductive morphology Flowers Androecium Stamens Filaments
Filaments 3–4.5 mm long.
Morphology Reproductive morphology Flowers Androecium Stamens Anthers
Anthers 1.5–2.1 mm long
Morphology Reproductive morphology Fruits
Nutlet reddish-brown, oblong-obovoid, trigonous, ± 1.8 mm long, ± 0.6 mm wide, minutely papillose.
Ecology
In dryish grassland and on rocky outcrops; 0–2100 m
Conservation
Least Concern (LC) due to its wide distribution and common habitat.
Distribution
Range: Rwanda, Burundi, Zimbabwe Flora districts: U2 U3 K1 K2 K4 K6 K7 T3 T4 T5 T7 T8

Native to:

Burundi, Kenya, Malawi, Rwanda, Sudan, Tanzania, Uganda, Zambia, Zimbabwe

Cyperus trigonellus Suess. appears in other Kew resources:

First published in Trans. Rhodesia Sci. Assoc. 43: 80 (1951)

Accepted by

  • Browning, J. & al. (2020). Flora Zambesiaca 14: 1-455. 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.

Literature

Kew Backbone Distributions

  • Browning, J. & al. (2020). Flora Zambesiaca 14: 1-455. Royal Botanic Gardens, Kew.
  • 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
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