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This species is accepted, and its native range is Africa to India, Lesser Sunda Islands to N. Australia.
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: Puerto Rico, Ventenat s.n. (C, holo.)
Morphology General Habit
Annual, tussocky, with a small root system, up to 30 cm tall.
Morphology Culms
Culms tufted, 3.5–10(–28) cm long, 0.4–1.3 mm wide, trigonous, slightly scabrid below the inflorescence
Morphology Leaves
Leaf sheath light grey to purple, 0.75–4.5 cm long, frequently not enclosing the culm base. Leaves up to 17.5 cm long. Leaf blade linear, flat, 3–14.5 cm long, 1.2–2.5 mm wide, apex acute to acuminate, scabrid on margins and primary vein
Morphology Reproductive morphology Inflorescences Bracts
Involucral bracts leaf-like, spreading, 1–2(–3), lowermost 1–5 cm long, 0.8–1.4 mm wide
Morphology Reproductive morphology Inflorescences
Inflorescence capitate.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets in digitate clusters, 3–17(–30) per inflorescence, linear-lanceolate, squarrose, 5.5–20 mm long, 3.2–6 mm wide, rachis straight.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes reddish-brown to chestnut, ovate, 2.8–4 mm long, 1.6–2.3 mm wide, with 5–8 pale-coloured veins on either side of the keel, acute to mucronate and recurved, scabrid
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 2–3.
Morphology Reproductive morphology Flowers Androecium Stamens Filaments
Filaments 2–3.5 m long.
Morphology Reproductive morphology Flowers Androecium Stamens Anthers
Anthers 0.4–0.8 mm long
Morphology Reproductive morphology Flowers Gynoecium Stigma
Stigma unbranched, or shallowly branched with 3 stigmas
Morphology Reproductive morphology Fruits
Nutlet greyish-brown, obovoid, triquetrous, 0.7–1.2 mm long, 0.6–0.8 mm wide, minutely papillose.
Ecology
In seasonally wet habitats, near temporary pools and swamps, in grasslands and wooded grassland, lava screes and shallow soils on rocks; also on alkaline soils; sea level to 2000 m
Conservation
Least Concern (LC) due to its wide distribution and common habitat.
Distribution
Range: Widespread in central, eastern and southern Africa; Madagascar, Teneriffe, India Flora districts: U1 U2 U3 U4 K1 K2 K3 K4 K5 K6 K7 T1 T2 T3 T5 T6

[FSOM]

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

Morphology General Habit
Tussocky annual with a small root-system, or forms with much swollen base perhaps perennial
Morphology Stem
Stems 2–20 cm long and 0.5–1.5 mm thick, triangular, slightly scabrid below the inflorescence, sometimes woody at the very base
Morphology Leaves
Leaf-blades 2–8 cm long and 1–4 mm wide, flat, scabrid on margin and midrib; sheaths pale or grey to purple, up to 10 mm wide, and frequently not enclosing the base all around
Morphology Reproductive morphology Inflorescences
Inflorescence a congested anthela with sessile spikelets only; major involucral bract leafy, 1–5 cm long and 0.5–2.5 mm wide, usually longer than the inflorescence; anthela 0.7–2.5 cm in diam., consisting of 3–25 large and sometimes much crowded spikelets
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets 4–15 x 4–6 mm, light to dark reddish brown, linear-lanceolate, squarrose, 12–40-flowered
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes 2.5–4 mm long, often of rather different length in each spikelet, ovate, reddish brown to chestnut with 5–8 very narrow paler nerves on each side of the midrib; midrib prominent at apex only, and here paler and excurrent into a short recurved scabrid mucro
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 3
Morphology Reproductive morphology Flowers Gynoecium Style
Style unbranched, but often twisted at the apex, or with 2–3 short or long branches
Morphology Reproductive morphology Fruits
Nutlet 0.9–1.1 x 0.6-0.75 mm, obovate, sharply triangular, greyish, minutely papillose.
Distribution
S3 Old World tropics.
Ecology
Near sea-level.

Native to:

Angola, Burundi, Canary Is., Cape Provinces, Djibouti, Eritrea, Ethiopia, Gulf States, India, Kenya, KwaZulu-Natal, Lesser Sunda Is., Madagascar, Mauritius, Namibia, Northern Provinces, Oman, Queensland, Rodrigues, Rwanda, Réunion, Saudi Arabia, Socotra, Somalia, Sudan, Swaziland, Tanzania, Uganda, Yemen, Zaïre

Cyperus rubicundus Vahl appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Jan 1, 1984 Mauritius K000362660 isotype
Jan 1, 1984 Gardner [s.n.], Mauritius K000362702
Oct 1, 1892 s.coll. [s.n.], India K000592550 Unknown type material
Jul 1, 1892 Schimper, W. [2340] K000362981
Jul 1, 1892 Schimper [603], Ethiopia K000362980
Schweinfurth, G. [1256], Eritrea K000362982
Lort Phillips [s.n.], Somalia K000362979

First published in Enum. Pl. Obs. 2: 308 (1805)

Accepted by

  • Audru, J., Cesar, J. & Lebrun, J.-P. (1993). Les Plantes Vasculaires de la République de Djibouti. Flore Illustrée 2(2): 433-968. CIRAD, Départerment d'Elevage et de Médecine vétérinaire, Djibouti.
  • 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.
  • Dobignard, D. & Chatelain, C. (2010). Index synonymique de la flore d'Afrique du nord 1: 1-455. Éditions des conservatoire et jardin botaniques, Genève.
  • 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.
  • Marais, W. & Araujo, A.C. (2018). Flore des Mascareignes 202: 1-99. IRD Éditions, MSIRI, RBG-Kew, Paris.
  • Miller, A.G. & Morris, M. (2004). Ethnoflora of Soqotra Archipelago: 1-759. The Royal Botanic Garden, Edinburgh.
  • Verloove, F. & Mesterházy, A. (2013). Cyperus glaber L. (Cyperaceae), an enigmatic species "new" to Spain Webbia; Raccolta de Scritti Botanici 68: 67-71.
  • Verloove, F. & Sáchez Gullón, E. (2010). Further notes on Cyperaceae in the Iberian Peninsula: corrections, adjustments and additions Flora Mediterranea 20: 141-147.

Literature

Kew Backbone Distributions

  • Audru, J., Cesar, J. & Lebrun, J.-P. (1993). Les Plantes Vasculaires de la République de Djibouti. Flore Illustrée 2(2): 433-968. CIRAD, Départerment d'Elevage et de Médecine vétérinaire, Djibouti.
  • 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.
  • Marais, W. & Araujo, A.C. (2018). Flore des Mascareignes 202: 1-99. IRD Éditions, MSIRI, RBG-Kew, Paris.
  • Miller, A.G. & Morris, M. (2004). Ethnoflora of Soqotra Archipelago: 1-759. The Royal Botanic Garden, Edinburgh.

Flora of Somalia

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

Flora of Tropical East Africa

  • Enum. Pl. 2: 308 (1806)
  • Fl. Eth. 6: 464 (1997).
  • Fl. Somalia 4: 133 (1995)
  • Haines & Lye, Sedges & Rushes E. Afr.: 258, figs. 520, 521 (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