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This species is accepted, and its native range is Tropical & S. Africa, Madagascar.
A specimen from Kew's Herbarium

[FWTA]

Cyperaceae, Miss S. S. Hooper. Flora of West Tropical Africa 3:2. 1972

Morphology General Habit
Leafy plant with a thin rhizome
Morphology Reproductive morphology Inflorescences
Very small blackish green spikelets
Ecology
Wet ground.

[FTEA]

Cyperaceae, K Hoenselaar, B. Verdcourt & H. Beentje. Hypolytrum, D Simpson. Fuirena, M Muasya. Flora of Tropical East Africa. 2010

Type
Type: Ethiopia, Mt Scholoda 3 km W of Adua, Schimper 391 (P, lecto., HAL, K!, isolecto.)
Morphology General Habit
Perennial, robust, up to 100 cm tall, stoloniferous, stolons reddish brown to almost black, up to 12 cm long, 1–3 mm in diameter.
Morphology Culms
Culms 33–90 cm long, 3–8 mm wide, triquetrous, glabrous
Morphology Leaves
Leaves up to 95 cm long. Leaf sheath light to dark brown, sometimes reddish to purplish brown, 2–11 cm long. Leaf blade linear, flat, longitudinal veins sometimes clearly visible, 22–87 cm long, 0.7–1.8 cm wide, apex acuminate, scabrid towards the apex on midrib and margins
Morphology Reproductive morphology Inflorescences Bracts
Involucral bracts 2–4. Leaf-like, spreading, the lowermost sometimes erect, 10–48 cm long, 0.5–1.4 cm wide
Morphology Reproductive morphology Inflorescences
Inflorescence simple to compound, primary branches 5–12, 1–9 cm long.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets in digitate clusters, sessile and at the end of primary, secondary and tertiary branches, 3–20 per cluster, ovoid-lanceolate, 2.4–5 mm long, 0.9–2 mm wide.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes dark brown to almost black in the centre, margins pale brown to grey, ovate to obovate, 1.3–1.8 mm long, 0.6–1 mm wide, keel pale brown to greyish-green, 3veined, apex acuminate to shortly mucronate
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 2.
Morphology Reproductive morphology Flowers Androecium Stamens Filaments
Filaments 1.2–1.4 mm long.
Morphology Reproductive morphology Flowers Androecium Stamens Anthers
Anthers 0.4–0.8 mm long
Morphology Reproductive morphology Flowers Gynoecium Style
Style with 3 stigma branches
Morphology Reproductive morphology Fruits
Nutlet pale greyish brown, lanceolate to ellipsoid, 1–1.3 mm long, 0.5–0.6 mm wide, short-apiculate, minutely wrinkled to irregularly papillose
Figures
Fig. 29, p199
Ecology
In wet habitats, on river-banks, near streams, pools and in swamps; 1200–2750 m
Conservation
Least Concern (LC) due to its wide distribution
Note
Haines & Lye say this is somewhat similar to C. difformis, but differs in stoloniferous perennial habit, less congested inflorescence, usually larger leaves and bracts.
Distribution
Flora districts: U1 U2 U3 U4 K1 K3 K4 K5 K6 T1 T2 T3 T4 T6 T7 T8 Range: Cameroon, Congo-Kinshasa, Rwanda, Burundi, Angola, Sudan, Ethiopia, Zambia, Malawi, Zimbabwe, South Africa

Native to:

Angola, Burundi, Cameroon, Eritrea, Ethiopia, Kenya, Madagascar, Malawi, Northern Provinces, Rwanda, Sudan, Tanzania, Uganda, Zambia, Zaïre, Zimbabwe

Cyperus dichrostachyus Hochst. ex A.Rich. appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Dec 1, 2000 Cheek, M. [9896], Cameroon K000673160
Dec 1, 2000 Cheek, M. [9790], Cameroon K000581635
Aug 1, 1892 Schimper [953], Ethiopia K000321364 Unknown type material
Aug 1, 1892 Schimper [391], Ethiopia K000321362 isotype
Aug 1, 1892 Schimper [857], Ethiopia K000321363
Bidgood, S. [5264], Tanzania K000190491

First published in Tent. Fl. Abyss. 2: 481 (1850)

Accepted by

  • Browning, J. & al. (2020). Flora Zambesiaca 14: 1-455. Royal Botanic Gardens, Kew.
  • Darbyshire, I., Kordofani, M., Farag, I., Candiga, R. & Pickering, H. (eds.) (2015). The Plants of Sudan and South Sudan: 1-400. Kew publishing, Royal Botanic Gardens, Kew.
  • Edwards, S., Demissew, S., & Hedberg, I. (eds.) (1997). Flora of Ethiopia and Eritrea 6: i-xxviii, 1-586. The National Herbarium, Addis Ababa University, Ethiopia & The Department of Systematic Botany, Upps.
  • Figueiredo, E. & Smith, G.F. (2008). Plants of Angola Strelitzia 22: 1-279. National Botanical Institute, Pretoria.
  • 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 West Tropical Africa

  • F.T.A. 8: 331
  • Kük. in Engl., Pflanzenr. Cyper. 233. (1936)
  • Tent. Fl. Abyss. 2: 481 (1851)

Kew Backbone Distributions

  • Browning, J. & al. (2020). Flora Zambesiaca 14: 1-455. Royal Botanic Gardens, Kew.
  • Figueiredo, E. & Smith, G.F. (2008). Plants of Angola Strelitzia 22: 1-279. National Botanical Institute, Pretoria.
  • 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): 233 (1936), as dichroostachyus
  • F.T.A. 8: 331 (1902), as dichroostachyus
  • Fl. Eth. 6: 436, fig. 212.63 (1997).
  • Haines & Lye, Sedges & Rushes E. Afr.: 165, figs. 308, 309 (1983)
  • Tent. Fl. Abyss. 2: 481 (1851)

Flora of Tropical East Africa
Flora of Tropical East Africa
http://creativecommons.org/licenses/by-nc-sa/3.0

Flora of West Tropical Africa
Flora of West Tropical 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