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This species is accepted, and its native range is W. Tropical Africa to Tanzania, N. Socotra.
A specimen from Kew's Herbarium

[FSOM]

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

Morphology General Habit
Fairly robust perennial with solitary stems and somewhat swollen stem bases from the end of long slender stolons
Morphology Stem
Stems 40–70 cm long and 1.5–2.5 mm thick, glabrous, triangular or somewhat compressed
Morphology Leaves
Leaves with green or somewhat reddish sheaths and 15–25 cm long and 3.5–5 mm wide blades
Morphology Reproductive morphology Inflorescences
Spikes with 5–15 spikelets only Anthela lax with 5–8 up to 10 cm long major branches; involucral bracts 5–7, up to 20 cm long
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets 10–15 x 1.5–2.5 mm, linear-lanceolate, terete to somewhat flattened, straw-coloured to light reddish brown or somewhat golden, 10–18-flowered
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes 3–4 mm long, oblong-lanceolate with acute or subobtuse apex, light reddish brown with green 5-nerved midrib
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 3
Morphology Reproductive morphology Flowers Gynoecium Style
Style with 3 long stigmas
Morphology Reproductive morphology Fruits
Nutlet elliptic-obovate, triangular.
Distribution
S3 scattered but rare in tropical Africa.
Ecology
Probably only below 50 m. altitude.

[FTEA]

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

Type
Type: Ghana, Thonning s.n. (C, holo.)
Morphology General Habit
Perennial, robust, stoloniferous, up to 82 cm tall.
Morphology Culms
Culms few, 27–68 cm long, 2.4–3.5 mm wide, trigonous to almost triquetrous, smooth with longitudinal grooves
Morphology Leaves
Leaves up to 38 cm long. Leaf sheath purple to brown at base, slightly breaking up into fibres, 1.5–6 cm long. Leaf blade linear to narrowly elliptic, flat, 20–32 cm long, 5.5–10 mm wide with several prominent veins, scabrid on margins and prominent veins, apex acute to acuminate
Morphology Reproductive morphology Inflorescences Bracts
Involucral bracts leaf-like, spreading, 3–5, lowermost 12–31 cm long, 5–1.1 mm wide
Morphology Reproductive morphology Inflorescences
Inflorescence simple, primary branches 5–6, 2–11 cm long.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets in loose clusters, sessile and at the end of primary branches, 11–20 per cluster, linear-lanceolate, 9–20 mm long, 1–2.4 mm wide, rachis straight.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes brown to reddish-brown, ovate, 3.5–4.1 mm long, 1.3–2 mm wide, with few veins on either side of the keel, margin uncoloured, keel green, apex acute
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 3.
Morphology Reproductive morphology Flowers Androecium Stamens Filaments
Filaments ± 3 mm long.
Morphology Reproductive morphology Flowers Androecium Stamens Anthers
Anthers 1.8–4.1 mm long
Morphology Reproductive morphology Fruits
Nutlet brown, obovoid-ellipsoid, trigonous, ± 1.1 mm long, ± 0.8 mm wide, smooth to minutely papillose.
Ecology
In seasonally wet habitats; 0–1150 m
Conservation
Least Concern (LC) due to its widespread distribution.
Distribution
Range: Widespread in West Africa, also found in central Africa and Somalia Flora districts: U4 T3 T6

[FWTA]

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

Morphology General Habit
Plant with many curved slender rhizomes
Morphology Reproductive morphology Inflorescences
Generally neat, acute, flat spikelets with red-tinged lanceolate glumes
Ecology
Damp grassland and as a weed in cultivation.

[FWTA]

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

Morphology General Habit
Slenderly rhizomatous perennial similar in habit to C. tenuiculmis
Morphology Reproductive morphology Inflorescences
Cylindrical or oblong spikes of short spikelets with distinctly apiculate glumes
Ecology
Grassland, river banks and other damp places.

Native to:

Benin, Burkina, Central African Repu, Chad, Congo, Gabon, Gambia, Ghana, Guinea, Gulf of Guinea Is., Ivory Coast, Liberia, Mali, Nigeria, Senegal, Sierra Leone, Socotra, Somalia, Sudan, Tanzania, Togo, Uganda, Zaïre

Cyperus dilatatus Schumach. appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Oct 1, 2008 Cheek, M. [13601], Cameroon K000580071
Schweinfurth, G. [2029], Somalia K000362986
Schweinfurth, G. [2016], Somalia K000362985

First published in Beskr. Guin. Pl.: 38 (1827)

Accepted by

  • Akoègninou, A., van der Burg, W.J. & van der Maesen, L.J.G. (eds.) (2006). Flore Analytique du Bénin: 1-1034. Backhuys Publishers.
  • Boulvert, Y. (1977). Catalogue de la Flore de Centrafrique 2(2): 1-94. ORSTOM, Bangui.
  • Cabezas, F., Aedo, C. & Velayos, M. (2004). Checklist of the Cyperaceae of Equatorial Guinea (Annobón, Bioko, Río Muni) Belgian Journal of Botany 137: 3-26.
  • 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.
  • 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.
  • Miller, A.G. & Morris, M. (2004). Ethnoflora of Soqotra Archipelago: 1-759. The Royal Botanic Garden, Edinburgh.
  • Sita, P. & Moutsambote, J.-M. (2005). Catalogue des plantes vasculaires du Congo, ed. sept. 2005: 1-158. ORSTOM, Centre de Brazzaville.
  • Velayos, M., Aedo, C., Cabezas, F., de la Estrella, M., Barberá, P. & Fero, M. (eds.) (2014). Flora de Guinea Ecuatorial 11: 1-416. Consejo superior de investigaciones científicas, Real jardín botánico, Madrid.

Literature

Flora of West Tropical Africa

  • Beskr. Guin. Pl. 38 (1827)
  • F.T.A. 8: 375.

Kew Backbone Distributions

  • Akoègninou, A., van der Burg, W.J. & van der Maesen, L.J.G. (eds.) (2006). Flore Analytique du Bénin: 1-1034. Backhuys Publishers.
  • Boulvert, Y. (1977). Catalogue de la Flore de Centrafrique 2(2): 1-94. ORSTOM, Bangui.
  • Cabezas, F., Aedo, C. & Velayos, M. (2004). Checklist of the Cyperaceae of Equatorial Guinea (Annobón, Bioko, Río Muni) Belgian Journal of Botany 137: 3-26.
  • 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.
  • 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.
  • Miller, A.G. & Morris, M. (2004). Ethnoflora of Soqotra Archipelago: 1-759. The Royal Botanic Garden, Edinburgh.
  • Sita, P. & Moutsambote, J.-M. (2005). Catalogue des plantes vasculaires du Congo, ed. sept. 2005: 1-158. ORSTOM, Centre de Brazzaville.

Flora of Somalia

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

Flora of Tropical East Africa

  • Beskr. Guin. Pl.: 38 (1827)
  • F.T.A. 8: 375 (1902)
  • Fl. Somalia 4: 122 (1995).
  • Haines & Lye, Sedges & Rushes E. Afr.: 196, figs. 385, 386 (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

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