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This species is accepted, and its native range is Somalia to E. 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: Somalia, Lort Phillips s.n. (K, holo.)
Morphology General Habit
Perennial, up to 53 cm tall, with a fleshy culm-base, without rhizome.
Morphology Culms
Culms 20–50 cm long, 1.2–3 mm wide, trigonous, in the lower part covered by wide greyish-white leaf sheaths, glabrous
Morphology Leaves
Leaves up to 46 cm long. Leaf blades many, linear, flat, 22–35 cm long, 3.2–5.6 mm wide, strongly scabrid along margin, apex acuminate Leaf sheath greyish-white, papery, 3–10.5 cm long.
Morphology Reproductive morphology Inflorescences Bracts
Involucral bracts leaf-like, spreading, 6–7, lowermost 21–30 cm long, 3–5 mm wide
Morphology Reproductive morphology Inflorescences
Spikes 1–1.5 cm long, sessile and at the end of primary branches. Inflorescence (capitate or) a simple anthela, primary branches (0–)4–6, 0.5–4 cm long.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets lanceolate, 3.9–5(–7.1) mm long, 1–1.3 mm wide, falling off entirely when matured, rachilla strongly nodular. Spikelets in dense spikes.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes greyish-white, sometimes with orange or reddish-brown tinge, ovate, 2.9–4 mm long, 1.4–2 mm wide, keel green, apex shortly mucronate
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 3
Morphology Reproductive morphology Fruits
Nutlet reddish-brown, obovoid, trigonous, 1.1–1.2 mm long, 0.7–0.8 mm wide, minutely papillose.
Ecology
Sandy soil near shore, wooded grassland, old cultivations, forest glades; 0–15(–750) m
Conservation
Probably Least Concern (LC) seeing the variety of habitats
Note
One of the specimens is from K 1, Dandu, Gillett 13075, at 750 m in rich AcaciaCommiphora bushland. This collection is very similar to the collections from the coast, but has considerably longer spikelets. More collections might make clear whether this should get varietal rank.
Distribution
Flora districts: K 1?, K7 Range: Somalia

[FSOM]

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

Type
N1, without precise locality, Lort Phillips s.n. (K holo.)
Morphology General Habit
Medium-sized perennial with a fleshy stem-base, but without a rhizome
Morphology Stem
Stem 20–50 cm long, triangular, glabrous, in the lower part covered by wide greyish white leaf-sheaths
Morphology Leaves
Leaves numerous, to 40 cm long and 2–6 mm wide, flat, strongly scabrid along the margin
Morphology Reproductive morphology Inflorescences
Spikes 10–20 x 5–8 mm, with numerous densely set glumes; rhachis strongly nodular, glabrous Inflorescence of 4–10 sessile or stalked spikes; largest peduncles 0.5–3 cm long
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets 3–5 x 1–1.3 mm, somewhat angular, falling off entire when mature
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes 2.5–3 mm long, greyish white with or without green midrib and sometimes with an orange or reddish brown tinge; apex usually shortly mucronate
Morphology Reproductive morphology Flowers Gynoecium Style
Style with 3 branches
Morphology Reproductive morphology Fruits
Nutlet 1.2–1.3 x 0.7–0.8 mm, obovate, triangular, reddish brown, almost smooth to minutely papillose, when mature held tightly pressed between the stiff margins of the glumes.
Distribution
N1; C2; S1, 3; Kenya
Ecology
Sea-level to c. 600 m.

Native to:

Kenya, Somalia

Cyperus phillipsiae (C.B.Clarke) Kük. appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Phillips [s.n.], Somalia K000321386 holotype

First published in H.G.A.Engler (ed.), Pflanzenr., IV, 20(101): 497 (1936)

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 Somalia

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

Flora of Tropical East Africa

  • E.P. 4, 20 (101): 497 (1936)
  • Haines & Lye, Sedges & Rushes E. Afr.: 210, fig. 420 (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

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