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This species is accepted, and its native range is Somalia to 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: South Africa, Natal, Krauss 287 (B!, holo.; photo!; G, K!, M, MO, iso.)
Morphology General Habit
Perennial, robust, succulent, 30–70 cm tall, with or without long stolons, with a thickened culm base or a ovoid pseudobulb to 4 cm in diameter.
Morphology Culms
Culms glossy, 9–60 cm long, 0.3–2.1 mm wide, trigonous, glabrous
Morphology Leaves
Leaf blade linear, flat, 5–50 cm long, 1.4–6 mm wide, scabrid on margin and primary vein, apex acuminate Leaf sheath pale to red-brown with wide translucent margin, 3–6 cm long, covering the basal pseudobulb, sometimes splitting into fibres. Leaves up to 30 cm long.
Morphology Reproductive morphology Inflorescences Bracts
Involucral bracts leaf-like, erect to spreading, 3–5, lowermost 3.5–13 cm long, 2.7–5.6 mm wide
Morphology Reproductive morphology Inflorescences
Inflorescence a simple anthela, primary branches (0–)2–6, (0–)1–7 cm long. Spikes ovoid, 10–25 × 10–20 mm
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets in loose clusters, sessile and at the end of primary branches, 7–16 per cluster, linear-lanceolate, 5–13.5 × 1–2.8 mm, rachilla straight. Spikelets falling on entirely when mature.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes reddish-brown with uncoloured margin, ovate-oblong, 3.3–5.5 mm long, 2–2.8 mm wide, keel green with several veins on either side, excurrent, apex shortly mucronate
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 3.
Morphology Reproductive morphology Flowers Androecium Stamens Filaments
Filaments 4–5.1 mm long.
Morphology Reproductive morphology Flowers Androecium Stamens Anthers
Anthers 2.2–2.8 mm long
Morphology Reproductive morphology Fruits
Nutlet reddish brown to blackish, obovoid, trigonous, 1.4–2 mm long, 0.6–1 mm wide, papillose.
Ecology
In grassland, woodland and rocky bushland, often on rocky outcrops; sea-level to 1500(–2100) m
Conservation
Least Concern (LC)
Note
Haines & Lye called pseudovestitus very similar to C. obsoletenervosus, but differing in presence/absence of stolons. Stolons are not visible in most specimens from either South or East Africa! There has been confusion about the taxa C. obsoletenervosus, C. pseudovestitus and C. vestitus in our area. The types of pseudovestitus (C.B. Clarke) Kük. in E.P. 4, 20 (101): 547 (1936) (South African Natal, Claremont, Schlechter 3145 (B, G, K!, M, Z, syn.) & Maritzburg, Schlechter 3310 (Z, syn.) & Umbilo River, Rehmann 8443 (K!, Z, syn.) & Grahamstown, Daly 669 (Z, syn.)) have inflorescences much more capitate than nearly all the East African material. Heads in South African material of this taxon consistently are made up of 1–3 tight ovoid spikes; in East African material the spikes are nearly always more lax, and higher in number, and with several of them stalked (except for a small group, e.g. Faden et al. 96/15 and Peter 39534 from Tanzania and Napper 1942 from Kenya); also, the glumes in EA material are longer than those of Schlechter 3145, with a green keel and an acute (not obtuse) apex – more like those of Rehmann 8443, another syntype of C. pseudovestitus! The type of C. vestitus is much more like the bulk of our material, including the types of C. obsoletenervosus, with the only exception being in the glume apex (though this is rather variable in our area) and the width of the pseudobulb; this last character varies considerably in South Africa, with some specimens resembling most of our material, which has more slender – though still succulent – pseudobulbs. It seems most practical to me to use the name vestitus for our material. The few capitate specimens cited above will have to remain unclear.
Distribution
Flora districts: U1 K1 K2 K4 K7 T1 T3 T8 Range: Congo-Kinshasa, Rwanda, Somalia, Malawi, South Africa

[FSOM]

M. Thulin et al. Flora of Somalia, Vol. 1-4 [updated 2008] https://plants.jstor.org/collection/FLOS

Morphology General Habit
Fairly robust succulent perennial with a thick ovate pseudobulb covered by pale to dark brown leaf-sheaths often splitting up into fibres, sometimes emitting slender stolons
Morphology Stem
Stems 10–50 cm long and 0.7–2 mm thick, triangular, glabrous
Morphology Leaves
Leaves up to 25 cm long and 2–6 mm wide, flat, strongly scabrid on margin and midrib
Morphology Reproductive morphology Inflorescences
Spikes 0.5–2.5 x 1–2 cm, with 6–15 spreading spikelets Inflorescence a 2–7 cm wide anthela consisting of 1–2 sessile and 3–8 stalked spikes; involucral bracts 2–5, leafy, erect or spreading, the largest 5–15 cm long and 2–7 mm wide; largest peduncle 1–7 cm long and 0.3–0.6 mm thick
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets 5–14 x 1.5–2.5 mm, linear-lanceolate, reddish brown, 8–12-flowered
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes 3–3.5 mm long, ovate-oblong, reddish brown with 3–5 lateral nerves and a green midrib excurrent in a prominent recurved mucro c. 0.5 mm long
Morphology Reproductive morphology Flowers Gynoecium Style
Style with 3 branches
Morphology Reproductive morphology Fruits
Nutlet 1.5–1.8 x 0.9–1 mm, triangular, obovate, dark brown to blackish; surface papillose.
Distribution
N1 eastern and southern Africa.
Ecology
Altitude range 600–1500 m.

Native to:

Kenya, KwaZulu-Natal, Malawi, Northern Provinces, Rwanda, Somalia, Tanzania, Uganda, Zaïre

Cyperus vestitus Hochst. ex C.Krauss appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Aug 7, 1986 Krauss [287], South Africa K000362932 Unknown type material
Aug 7, 1986 Gerrard, W.T. [701], South Africa K000362933
Aug 7, 1986 Krauss [287], South Africa K000362931 Unknown type material
Peter, A. [13348], Tanzania Cyperus obsoletenervosus K000321472 syntype

First published in Flora 28: 755 (1845)

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 Somalia

  • Flora Somalia, Vol 4, (1995) Author: by K. A. Lye [updated by M. Thulin 2008]

Flora of Tropical East Africa

  • E.P 4: 20 (101): 542 (1936)
  • Fl. Somalia 4: 138 (1995).
  • Flora 28: 755 (1845)
  • Haines & Lye, Sedges & Rushes E. Afr.: 212, figs. 425, 426 (1983)

Flora of Somalia
Flora of Somalia
http://creativecommons.org/licenses/by-nc-sa/3.0

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