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This species is accepted, and its native range is SE. Kenya to E. Tanzania (incl. Zanzibar, Pemba), W. Madagascar.
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: Tanzania, Zanzibar, Hildebrandt 1073 & Lushoto District: Mashewa, Holst 3520 (B, holo.; K!, syn.)
Morphology General Habit
Perennial, robust, up to 2 m high.
Morphology Culms
Culms 110–200 cm long, 0.9–1.2 cm wide, trigonous to triquetrous, glabrous
Morphology Leaves
Leaves up to 200 cm. Leaf blade 80–175 cm long, 1.7–4 cm wide, linear, with 2 main veins next to primary vein, flat, scabrid on the veins and margins, apex acuminate Leaf sheath reddish-brown to reddish-black, 17–35 cm long.
Morphology Reproductive morphology Inflorescences Bracts
Involucral bracts 2–8. Leaf-like, lowermost 23–127 cm long, 1.4–3.7 cm wide
Morphology Reproductive morphology Inflorescences
Inflorescence simple to compound, primary branches 3–10, 10–30 cm long, prophylls 4–6 cm long.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets in crowded clusters on elongated axis, sessile and at the end of primary and secondary branches, many per cluster, linear (sometimes lanceolate), almost terete, 5–24 mm long, 0.7–1.2 mm wide.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes yellow to pale brown, obovate, 2–2.6 mm long, 1–2 mm wide, keel green, 3–4-veined, apex (shortly) mucronate to awned, the awn up to 2–3 mm long
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 3: filaments 1.7–2.3 mm long.
Morphology Reproductive morphology Flowers Androecium Stamens Anthers
Anthers 0.8–1.2 mm long
Morphology Reproductive morphology Fruits
Nutlet white, maturing black, ellipsoid, trigonous, 0.9–1 mm long, 0.4–0.6 mm wide, glabrous.
Ecology
Swamps, in stagnant or moving water; sea-level–400 m
Conservation
Possibly vulnerable due to the development taking place in the coastal strip, but specific data lacking. VU (B1 a biii)?
Distribution
Flora districts: K7 T6 Z P Range: Not known elsewhere

Native to:

Kenya, Madagascar, Tanzania

Cyperus grandis C.B.Clarke appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Jan 1, 1892 Hildebrandt, J.M. [1073], Tanzania K000321410 Unknown type material

First published in D.Oliver & auct. suc. (eds.), Fl. Trop. Afr. 8: 372 (1901)

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.

Literature

Kew Backbone Distributions

  • Hoenselaar, K., Verdcourt, B. & Beentje, H. (2010). Cyperaceae Flora of Tropical East Africa: 1-466.

Flora of Tropical East Africa

  • E.P. 4, 20 (101): 54 (1936)
  • F.T.A. 8: 372 (1902)
  • Haines & Lye, Sedges & Rushes E. Afr.: 178, fig. 339 (1983).
  • P.O.A. C: 118 (1895)

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