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This species is accepted, and its native range is SE. Kenya.
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: Kenya, Kwale District: near Taru, between Samburu and Mackinnon Road, Drummond & Hemsley 4153 (K!, holo.; EA!, iso.)
Morphology General Habit
Annual (perhaps perennial), fairly slender, growing in tussocks, up to 21 cm tall.
Morphology Culms
Culms tufted, 5–19 cm long, 0.6–1.1 mm wide, trigonous, glabrous
Morphology Leaves
Leaves up to 18 cm long. Leaf blade linear, flat, 5.5–15 cm long, 0.5–1 mm wide, apex acute, glabrous Leaf sheath dark purplish below, straw-coloured above, 1–3 cm long.
Morphology Reproductive morphology Inflorescences Bracts
Involucral bracts leaf-like, spreading, 2, lowermost 2.4–5.5 cm long, 1–1.4 mm wide
Morphology Reproductive morphology Inflorescences
Inflorescence capitate.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets 4–7 per head, linear-lanceolate, 7–20 mm long, 2–3.5 mm wide, straight or curved, with 20–40 glumes per spikelet.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes reddish-brown, ovate, 2.2–3.1 mm long, 1.2–1.6 mm wide, without or with 2 very obscure thin lateral veins, keel greenish, slightly excurrent, apex acute to acuminate
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 3.
Morphology Reproductive morphology Flowers Androecium Stamens Anthers
Anthers 1.1–1.4 mm long
Morphology Reproductive morphology Fruits
Nutlet purplish black, obovoid, 0.8–0.9 mm long, ± 0.6 mm wide minutely papillose, apiculate
Ecology
On damp shallow sandy soil over rocks (may be mat-forming) and in rocky pools; 350–400 m
Conservation
Only known from 2 collections; needs more information on population size and local threats
Note
C. boreobellus is closely related to C. kirkii C.B. Clarke but has larger glumes and only occurs in Kenya. C. kirkii is only recorded from Tanzania.
Distribution
Range: Not known elsewhere Flora districts: K7

Native to:

Kenya

Cyperus boreobellus Lye appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Drummond, R.B. [4153], Kenya K000321444 holotype

First published in Nordic J. Bot. 3: 220 (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. 522, 523 (1983).
  • Nordic Journ. Bot. 3: 220 (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