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This variety is accepted, and its native range is Tropical & S. Africa, Aldabra, S. Madagascar, Arabian Peninsula.
Cyperus niveus var. leucocephalus

[FTEA]

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

Type
Type: South Africa, Cape of Good Hope, ? Drège s.n. (B, holo.)
Morphology Culms
Culms 16–116 cm long, 1–3.7 mm wide, trigonous (to rounded)
Morphology Leaves
Leaf blade flat, 10–56 cm long, 1.4–8 mm wide
Morphology Reproductive morphology Inflorescences Bracts
Involucral bracts 2–4, lowermost 3.5–23 cm long, 1.2–6 mm wide.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets (5–) many per head, 9–17 mm long, 4–9 mm wide.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes (dirty) white, with a pinkish or pale brown tinge, elliptic-lanceolate to ovate, 4.3–8.9(–11.6) mm long, 2.4–3.8(–5.6) mm wide
Morphology Reproductive morphology Fruits
Nutlet brown to black, obovoid, trigonous, 1.6–2.9 mm long, 1.3–1.8 mm wide.
Ecology
Miombo woodland, dry grassland, on stony slopes, on shallow soil over rocks, in dried up riverbeds, swampy areas and in cultivated areas; sea-level to 2000 m
Conservation
Least Concern (LC) due to its wide distribution and common habitat.
Note
Haines & Lye already remarked on the few differences between C. margaritaceus and C. niveus (in my key separated only by presence/absence of rhizomes, but by Haines & Lye also separated by the slightly larger stem base in margaritaceus, and less compressed spikelets) with the taxa tisserantii and nduru intermediate – and possibly linked to fire regimes. It is quite possible this is all one species; niveus is the oldest name (HB).
Distribution
Flora districts: U1 U2 U3 U4 K1 K2 K3 K4 K5 K6 K7 T1 T2 T3 T4 T5 T6 T7 T8 Z Range: Benin, Nigeria, Cameroon, Gabon, Congo-Kinshasa, Rwanda, Burundi, Ethiopia, Somalia, Botswana, Namibia, South Africa

[FSOM]

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

Morphology Reproductive morphology Inflorescences
Inflorescence white as young, pale reddish brown when mature.
Distribution
N1, 2; C2; S2, 3 widespread in Africa and western Asia.
Ecology
Near sea-level to 1800 m.

[FWTA]

Cyperaceae, Miss S. S. Hooper. Flora of West Tropical Africa 3:2. 1972

Morphology General Habit
Perennial 30–90 cm. high with clustered stem-bases thickened by leaf-sheaths
Morphology Reproductive morphology Inflorescences
A head of numerous large, flattened, pinkish-white, congested spikelets of numerous long, narrow, folded glumes
Ecology
Savanna or open woodland.

Native to:

Aldabra, Benin, Botswana, Burundi, Cameroon, Cape Provinces, Congo, Djibouti, Eritrea, Ethiopia, Free State, Gabon, Guinea, Kenya, KwaZulu-Natal, Lesotho, Madagascar, Malaya, Mozambique, Namibia, Nigeria, Northern Provinces, Rwanda, Saudi Arabia, Somalia, Sudan, Swaziland, Tanzania, Uganda, Yemen, Zambia, Zaïre, Zimbabwe

Cyperus niveus var. leucocephalus (Kunth) Fosberg appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Dec 7, 2011 de Wilde, J.J.F.E. [11451], Gabon K001322135
Jan 1, 2006 Walters, G., Harris, D., Mouandza [1607], Gabon K001322134
May 5, 1993 Moggi [135], Somalia K001322141
May 5, 1993 Moggi [2115], Somalia K001322140
Friis, I., Bidgood, S., Hailu, [11272], Ethiopia K001322142
Friis, I., Bidgood, S., Hailu, [11295], Ethiopia K001322143
Tardelli [510], Somalia K001322139
Oct 1, 1892 Forbes [s.n.], South Africa Cyperus obtusiflorus K000362855
Aug 1, 1892 Pervillé, -N.O. [690], Madagascar Cyperus obtusiflorus K000362661 Unknown type material
Drege [s.n.], South Africa Cyperus obtusiflorus K000362853
Krauss [324], South Africa Cyperus obtusiflorus K000362854
Oct 5, 1971 Harrington, A.J. [23], Nigeria Cyperus ledermannii K001322131
Jan 1, 1971 Clayton, D.C. [1034], Nigeria Cyperus ledermannii K001322124
Jan 1, 1971 Magaji, S.O. [17], Nigeria Cyperus ledermannii K001322129
Jan 1, 1971 Kershaw, K.A. [90036], Nigeria Cyperus ledermannii K001322127
Jan 1, 1971 Lely, H.V. [148], Nigeria Cyperus ledermannii K001322126
Jan 1, 1971 Keay, R.W.J. [25772], Nigeria Cyperus ledermannii K001322125
Jan 1, 1971 Baikie, W.B. [s.n.], Nigeria Cyperus ledermannii K001322130
Jan 1, 1971 Keay, R.W.J. [22958], Nigeria Cyperus ledermannii K001322123
Jan 1, 1971 Taylor, C.B. [18], Nigeria Cyperus ledermannii K001322122
Jan 1, 1971 Lawlor [383], Nigeria Cyperus ledermannii K001322120
Jan 1, 1971 Clayton, D.C. [1203], Nigeria Cyperus ledermannii K001322128
Jan 1, 1971 Lehf, H.V. [291], Nigeria Cyperus ledermannii K001322121

First published in Kew Bull. 31: 835 (1977)

Accepted by

  • 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.
  • Edwards, S., Demissew, S., & Hedberg, I. (eds.) (1997). Flora of Ethiopia and Eritrea 6: i-xxviii, 1-586. The National Herbarium, Addis Ababa University, Ethiopia & The Department of Systematic Botany, Upps.
  • 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.
  • Lye, K.A. & Thery, P. (2012). Flore du Gabon 44: 1-230. Muséum National D'Histoire Naturelle, Paris.
  • Sosef, M.S.M. & al. (2006). Check-list des plantes vasculaires du Gabon Scripta Botanica Belgica 35: 1-438.

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.
  • Edwards, S., Demissew, S., & Hedberg, I. (eds.) (1997). Flora of Ethiopia and Eritrea 6: i-xxviii, 1-586. The National Herbarium, Addis Ababa University, Ethiopia & The Department of Systematic Botany, Upps.
  • 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.
  • Sosef, M.S.M. & al. (2006). Check-list des plantes vasculaires du Gabon Scripta Botanica Belgica 35: 1-438.

Flora of Somalia

  • Flora Somalia, Vol 4, (1995) Author: by K. A. Lye [updated by M. Thulin 2008]
  • Kew Bull. 31: 835 (1977).

Flora of Tropical East Africa

  • Fl. Eth. 6: 464 (1997).
  • Fl. Somalia 4: 130 (1995)
  • Haines & Lye, Sedges & Rushes E. Afr.: 256, figs. 517, 518 (1983)
  • K.B. 31: 835 (1977)

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

Flora of West Tropical Africa
Flora of West Tropical 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

Kew Science Photographs
Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/3.0/