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This species is accepted, and its native range is S. Tanzania.
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: Songea District: by Lumecha Bridge North of Songea, Milne-Redhead & Taylor 8405 (BR!, holo.; K!, EA, iso.)
Morphology General Habit
Perennial, slender, growing in very dense tussocks, up to 19 cm tall.
Morphology Culms
Culms tufted, 4–18 cm long, 0.3–0.5 mm wide, trigonous, smooth
Morphology Leaves
Leaves up to 11 cm long. Leaf blade linear, flat, 3.5–9.5 cm long, 0.3–0.6 mm wide, glabrous, apex acute Leaf sheath brown with slightly reddish parts, 0.7–1.5 cm long.
Morphology Reproductive morphology Inflorescences Bracts
Involucral bracts leaf-like, spreading or sometimes slightly erect, 2, lowermost 1–3.5 cm long, 0.5–0.7 mm wide
Morphology Reproductive morphology Inflorescences
Inflorescence capitate.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets 3–10 per head, linear-lanceolate, 4–10.5 mm long, 2–2.5 mm wide, straight to curved, with 8–20 glumes per spikelet.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes dark reddish-brown to almost black, elliptic-lanceolate, 2–2.5 mm long, 0.9–1.1 mm wide, 3–4 veins on each side of keel, keel slightly paler coloured then rest of glume, slightly excurrent, apex acute to acuminate
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 3.
Morphology Reproductive morphology Flowers Androecium Stamens Anthers
Anthers 1.1–1.3 mm long
Morphology Reproductive morphology Fruits
Nutlet dark reddish brown, obovoid, 0.6–0.8 mm long, 0.5–0.6 mm wide, minutely papillose in longitudinal rows, apiculate.
Ecology
In shallow soil overlying rocks by riverside; 930 m
Conservation
DD; lacks data on population size and threats, but probably at least Vulnerable
Distribution
Flora districts: T8 Flora districts: Known from type only

Native to:

Tanzania

Cyperus castaneobellus Lye appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Milne-Redhead, E. [8405], Tanzania K000321445 isotype

First published in Nordic J. Bot. 3: 227 (1983)

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

Flora of Tropical East Africa

  • Haines & Lye, Sedges & Rushes E. Afr.: 258, figs. 525, 526 (1983).
  • Nordic Journ. Bot. 3: 227 (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