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This species is accepted, and its native range is NE. & E. Tropical Africa, W. Indian Ocean.

[FTEA]

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

Type
Type: Ethiopia [Abyssinia], Schimper s.n. (B, holo.)
Morphology General Habit
Perennial to 80 cm, rather robust.
Morphology Culms
Culms clustered or slightly spaced from a thick horizontal rhizome, triangular, 40–80 cm long, 1.5–3 mm thick, glabrous
Morphology Leaves
Leaves with sheaths 2–10 cm long, pale reddish brown; blade 10–50 cm long, 3–7 mm wide, scabrid on margins and midrib, apex acute to acuminate
Morphology Reproductive morphology Inflorescences Bracts
Involucral bracts 4–8, erect or spreading, the lowermost 11–30 cm long
Morphology Reproductive morphology Inflorescences
Inflorescence simple, with 1 sessile and 5–9 stalked spikes, the stalks to 5 cm long. Spikes cylindrical, 12–55 × 7–17 mm, with many densely set spikelets
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets spreading, linear-lanceolate, 5–9 × 1–1.3 mm, falling off entire when mature, rachilla winged.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes red-brown to dark red-brown, oblong-elliptic, 3–4 mm long, many-veined and with pale green midrib
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 3.
Morphology Reproductive morphology Flowers Androecium Stamens Anthers
Anthers 2 mm long
Morphology Reproductive morphology Flowers Gynoecium Stigma
Stigma 3-branched
Morphology Reproductive morphology Fruits
Nutlets whitish (or not seen mature?), oblong, 1.3–2.1 × 0.5–0.7 mm, triangular, ± smooth.
Ecology
Stream sides, forest clearings and -margins, secondary vegetation derived from forest, rocky sites; 1350–2250 m
Conservation
Least concern
Note
Kükenthal in E.P. 4, 20 (101): 492 (1936) includes Mariscus procerus A. Rich. as a synonym; he specifically excludes Cyperus procerus Rottb. He includes a specimen from Tanzania not seen by me, HB (Usambaras, Holst 306a). He also has C. rohlfsii as a variety of this taxon; we have that as a species in its own right! Haines & Lye state this is very rare in Uganda, and cite is Haines 4473 from Uganda, Sebei, Bukwa. I (HB) have not seen any specimens from Uganda.
Distribution
Flora districts: K1 K3 K4 K5T1 T2 T ?3 (see note) Range: Eritrea, Ethiopia, Somalia; Soqotra

Native to:

Eritrea, Ethiopia, Kenya, Madagascar, Mauritius, Socotra, Somalia, Sudan, Tanzania, Uganda

Cyperus impubes Steud. appears in other Kew resources:

First published in Syn. Pl. Glumac. 2: 45 (1854)

Accepted by

  • 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.
  • 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

  • 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.

Flora of Tropical East Africa

  • Fl. Eth. 6: 457, fig. 212.102 (1997).
  • Haines & Lye, Sedges & Rushes E. Afr.: 209, fig. 419 (1983)
  • Kük.in E.P. 4, 20 (101): 492 (1936)
  • Syn. Plant. Glum. 2: 45 (1854)

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