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This species is accepted, and its native range is SE. Kenya to S. DR Congo.
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, Tanga District: Tanga coast area, Holst 2026, 4026 (B, syn.)
Morphology General Habit
Perennial up to 115 cm tall, fairly robust, with ± 2 mm thick stolons covered by loose scales.
Morphology Culms
Culms few, 45–67 cm long, 3.5–6 mm in diameter, trigonous, smooth
Morphology Leaves
Leaf sheath pale brown, sometimes pale reddish-brown, 6–12 cm long. Leaves 1–3, up to 50 cm long. Leaf blade linear, flat, 16–38 cm long, 5.5–10 mm wide, slightly scabrid on margin, apex acute to acuminate
Morphology Reproductive morphology Inflorescences Bracts
Involucral bracts leaf-like, erect to spreading, 6–9, lowermost 22–38 cm long, 5.5–7 mm wide
Morphology Reproductive morphology Inflorescences
Inflorescence a compound anthela, primary branches 5–12, 6–26 cm long.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets in digitate spikes, sessile and on primary and secondary branches, 6–20 per spike, linear, 5–30 mm long, 1.4–2.2 mm wide, rachilla straight.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes brown, boat-shaped, 4.4–6.5 mm long, 1.8–2.2 mm wide, keel green, with several veins on either side, apex obtuse
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 3.
Morphology Reproductive morphology Flowers Androecium Stamens Filaments
Filaments 2.7–4.3 mm long.
Morphology Reproductive morphology Flowers Androecium Stamens Anthers
Anthers 1.7–1.8 mm long
Morphology Reproductive morphology Fruits
Nutlet brownish, trigonous, 0.8–1 mm long, 0.5–0.6 mm wide, minutely papillose.
Ecology
In seasonally wet grassland, alongside pools and in swamps; sea-level up to 250 m
Conservation
Least concern to near threatened, due to small distribution area in a rapidly changing coastal strip.
Distribution
Range: Not known elsewhere Flora districts: K7 T3 T8

Native to:

Kenya, Tanzania, Zaïre

Cyperus holstii Kük. appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Peter, A. [14484], Kenya K000321412 syntype

First published in Repert. Spec. Nov. Regni Veg. 21: 328 (1925)

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

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): 75 (1936)
  • F.R. 21: 328 (1925)
  • Haines & Lye, Sedges & Rushes E. Afr.: 184, 356 (1983).

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