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This species is accepted, and its native range is Tropical & S. Africa.
A specimen from Kew's Herbarium

[FTEA]

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

Type
Type: Angola, District Huilla, Welwitsch 6875 (BM!, syn.), Angola, Welwitsch 7025 (LISU, lecto.; BM!, iso.) [Haines & Lye only mention the last one, which could be taken as a lectotypification]
Morphology General Habit
Perennial up to 90 cm high, slender to robust, with slightly swollen base and many 1–2 mm thick roots.
Morphology Culms
Culms tufted, 21–82 cm long, 0.8–2.2 mm wide, trigonous, smooth, the basal part surrounded by wide blackish leaf sheaths
Morphology Leaves
Leaf sheath brown, 4–9.5 cm long. Leaf blade linear, folded, sometimes channelled, stiff, 18–37 cm long, 1.2–3.8 mm wide, acute to acuminate, apex ± scabrid Leaves up to 45 cm long.
Morphology Reproductive morphology Inflorescences Bracts
Involucral bracts leaf-like, 2–3, 8–12.2 cm long, 1.2–3.2 mm wide, often folded and stiff
Morphology Reproductive morphology Inflorescences
Inflorescence simple (to compound), primary branches 2–4, 1–3 cm long.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets loosely to densely arranged in digitate clusters, sometimes on an elongated axis, the clusters sessile and at the end of primary branches. Spikelets 8–20 to many per cluster, narrowly linearlanceolate to narrowly ovoid, 7.2–15 mm long, 1.5–1.9 mm wide, axis straight to curved.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes brown-black, linear-lanceolate to elliptic, 2.1–2.5 mm long, 1–1.3 mm wide, keel ± acute, (yellowish) green, grooved, 2-veined, apex acute to sometimes ± obtuse
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 3.
Morphology Reproductive morphology Flowers Androecium Stamens Filaments
Filaments (0.9–)1.4–1.7 mm long.
Morphology Reproductive morphology Flowers Androecium Stamens Anthers
Anthers 0.6–1.3 mm long
Morphology Reproductive morphology Flowers Gynoecium Stigma
Stigma 2-branched
Morphology Reproductive morphology Fruits
Nutlet grey, often shiny, oblong-cylindrical to ellipsoid, 0.9–1.1 mm long, 0.3–0.4 mm wide, minute tubercles in longitudinal rows.
Ecology
Swampy grassland; 900–2200 m
Conservation
Least concern (LC) although not widespread in the Flora area, the species is fairly wide distributed, and occurs in a common habitat.
Note
The species closest related to P. aethiops seems to be P. nuerensis. The most obvious differences can be found in the width of the leaves and involucral bracts, the size and colour of the glumes, and the number of stamens per glume.
Distribution
Range: Cameroon, Congo-Kinshasa, Sudan, Ethiopia, Angola, Zambia, Botswana, South Africa Flora districts: K3 T4 T7 T8

Native to:

Angola, Botswana, Burkina, Cameroon, Cape Provinces, Central African Repu, Chad, Congo, Ethiopia, Free State, Guinea, Ivory Coast, Kenya, KwaZulu-Natal, Lesotho, Malawi, Mozambique, Namibia, Northern Provinces, Sudan, Swaziland, Tanzania, Zambia, Zaïre, Zimbabwe

Cyperus aethiops Welw. ex Ridl. appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Mar 1, 1891 Cooper, T. [912], South Africa Pycreus cooperi K000363046 Unknown type material
Mar 1, 1891 Rehmann, A. [5652], South Africa Pycreus cooperi K000363048
Drege [s.n.], South Africa Pycreus cooperi K000363047
Fries, T.C.E. [2911], Kenya Pycreus aethiops K000363000 Unknown type material

First published in Trans. Linn. Soc. London, Bot. 2: 129 (1884)

Not 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. [Cited as Pycreus aethiops.]
  • Govaerts, R. (1999). World Checklist of Seed Plants 3(1, 2a & 2b): 1-1532. MIM, Deurne. [Cited as Pycreus aethiops.]

Literature

Kew Backbone Distributions

  • Boulvert, Y. (1977). Catalogue de la Flore de Centrafrique 2(2): 1-94. ORSTOM, Bangui.
  • Browning, J. & al. (2020). Flora Zambesiaca 14: 1-455. Royal Botanic Gardens, Kew.
  • Hoenselaar, K., Verdcourt, B. & Beentje, H. (2010). Cyperaceae Flora of Tropical East Africa: 1-466.
  • Lisowski, S. (2009). Flore (Angiospermes) de la République de Guinée Scripta Botanica Belgica 41: 1-517.
  • Sita, P. & Moutsambote, J.-M. (2005). Catalogue des plantes vasculaires du Congo, ed. sept. 2005: 1-158. ORSTOM, Centre de Brazzaville.
  • Thiombiano, A., Schmidt, M., Dressler, S., Ouédraogo, A., Hahn, K. & Zizka, G. (2012). Catalogue des plantes vasculaires du Burkina Faso Boissiera 65: 1-391.

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/