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This species is accepted, and its native range is Somalia to Burundi and N. Botswana.
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: Uganda, Ruwenzori, Scott Elliot 7590 (K, syn.) & Tanzania, Kilimanjaro, Volkens 1620 (B, syn.)
Morphology General Habit
Perennial up to 120 cm tall, robust, stoloniferous with a swollen stem-base and with or without a short rhizome, stolons to 15 cm long, 0.5–3 mm thick.
Morphology Culms
Culms few, 47–102 cm long, 2–4.2 mm wide, trigonous, sometimes almost triquetrous, glabrous
Morphology Leaves
Leaves on lower half of culm, up to 58 cm long. Leaf sheath rather conspicuous, green to brownish above, dark brown to purple near culm-base, 3–12.5 cm long. Leaf blade linear, flat or W-shaped in cross-section, 15–45 cm long, 4.9–12 mm wide, scabrid on margins and primary vein, apex acute
Morphology Reproductive morphology Inflorescences Bracts
Involucral bracts leaf-like, erect to spreading, 4–8, lowermost 9–40 cm long, 4–23.5 cm long
Morphology Reproductive morphology Inflorescences
Inflorescence a lax anthela with 5–10 main branches.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets in loose clusters, sessile and at the end of primary (and sometimes secondary) branches, 10–30 per cluster, linear-lanceolate, 7.2–24 mm long, 0.9–1.6 mm wide, falling off entirely when mature.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes greenish, golden or reddishbrown, with a translucent border, ovate-lanceolate, 4–5.2 mm long, 1.6–1.9 mm wide, keel green, sometimes slightly excurrent, apex rounded to sometimes acute
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 3.
Morphology Reproductive morphology Flowers Androecium Stamens Filaments
Filaments 4.4–5.5 m long.
Morphology Reproductive morphology Flowers Androecium Stamens Anthers
Anthers 1.8–3.2 mm long
Morphology Reproductive morphology Fruits
Nutlet grey, obovoid, trigonous, 2.2–2.5 mm long, 0.8–0.9 mm wide, slightly apiculate, minutely papillose.
Ecology
In grassland and cleared forest, also found as a weed in cultivated land; 900–2450 m
Conservation
Least Concern (LC) due to its wide distribution
Distribution
Range: Congo-Kinshasa, Rwanda, Burundi, Somalia, South Africa Flora districts: U2 U3 U4 K 3/ K6 K5 T1 T2 T5 T6 T7 T8

[FSOM]

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

Morphology General Habit
Robust stoloniferous perennial with a swollen stem base and with or without a short rhizome; stolons to 15 cm long and 0.5–1 mm thick, but to 3 mm thick with persistent fibrous sheaths; stems 25–70 cm long and 3–5 mm thick, triangular, with leaves in lower half
Morphology Leaves
Leaves 15–40 cm long and 5–15 mm wide, flat, with scabrid margin and midrib; sheaths rather conspicuous, green to brownish above, dark brown to purple near the stem base
Morphology Reproductive morphology Inflorescences
Spikes 15–45 x 20–50 mm, with many spreading spikelets; rhachis strongly winged Inflorescence a lax anthela; major peduncles 5–10, 0.5–25 cm long, carrying single spikes or with 1–3 secondary spikes at the base of some of the main spikes; involucral bracts 6–10, leafy, erect or spreading, the largest 15–40 cm long and 6–12 mm wide
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets 10–30 x 0.7–1.5 mm, linear-lanceolate, falling off entire when mature
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes 3.5–4.5 mm long, ovate-lanceolate, greenish, golden or reddish brown with translucent border and a greenish midrib (which is sometimes slightly excurrent)
Morphology Reproductive morphology Flowers Gynoecium Style
Style 3-branched.
Distribution
S2 scattered in eastern Africa.
Ecology
Altitude range 0–50 m.

Native to:

Botswana, Burundi, Kenya, Malawi, Rwanda, Somalia, Tanzania, Uganda, Zambia, Zaïre, Zimbabwe

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

Date Reference Identified As Barcode Type Status
Scott Elliot, G.F. [7590], Uganda K000321456 syntype
Bidgood, S. [5183], Tanzania K000190411

First published in H.G.A.Engler (ed.), Pflanzenr., IV, 20(101): 412 (1936)

Accepted by

  • Browning, J. & al. (2020). Flora Zambesiaca 14: 1-455. Royal Botanic Gardens, Kew.
  • 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

  • Browning, J. & al. (2020). Flora Zambesiaca 14: 1-455. Royal Botanic Gardens, Kew.

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): 412 (1936)
  • Fl. Somalia 4: 132 (1995).
  • Haines & Lye, Sedges & Rushes E. Afr.: 202, figs. 403, 404 (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