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This species is accepted, and its native range is S. Tropical Africa to N. Botswana.
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: Malawi, Buchanan 1428 (B!, holo.)
Note
Kükenthal says this occurs in Tanzania: Usagara near Kidete, 3 Dec. 1925, Peter 32733 (B!) & 45633 (B!); W Usambara, Gamba near Makuyuni, Peter 15367 (B!); but the Tanzanian material looks different from the Malawi type of K. nigripes. The glumes on the type are quite acuminate; the glumes on the Tanzanian material are merely acute. It looks like the type might only have a single spike, but the head looks slightly damaged; the Tanzanian material usually has subsidiary spikes at the inflorescence base, as well. Buchanan 1425 (the B specimen) looks lacks the basal fibres which are much in evidence in the Tanzanian material; it looks very much like alba, but with the keel not or hardly winged. As the B specimen lacks much of its base, a decision will have to await the return of the K types, which are out on loan. It is possible there was a thin rhizome at one stage – but that might just be a root cut through, as well. Which leaves the Tanzanian material cited by Kükenthal. This keys to oblonga or crassipes, but distinct in presence of many fine and dense fibres around culm base. Peter 32733 has some hairs at the base of the glume keel. Glumes 4–5, the lower two empty, the flowers bisexual (but the upper very small, maybe not maturing a fruit). Style 2-fid. As I have not seen any mature nutlets, I am not even sure whether the material represents a Kyllinga or a Cyperus.

Doubtfully present in:

Tanzania

Native to:

Botswana, Malawi, Zambia, Zimbabwe

Cyperus nigripes (C.B.Clarke) Kük. appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Feb 3, 1898 Buchanan, J. [1428], Malawi Kyllinga nigripes K000416326 Unknown type material

First published in H.G.A.Engler (ed.), Pflanzenr., IV, 20(101): 572 (1936)

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 Kyllinga nigripes.]
  • Govaerts, R. (1999). World Checklist of Seed Plants 3(1, 2a & 2b): 1-1532. MIM, Deurne. [Cited as Kyllinga nigripes.]

Literature

Kew Backbone Distributions

  • 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.

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