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This species is accepted, and its native range is SW. Kenya to Zimbabwe, Central Madagascar.

[FTEA]

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

Type
Type: Madagascar, Antsirabé, Perrier 13061 (P, holo.)
Morphology General Habit
Annual, up to 35 cm high.
Morphology Culms
Culms tufted, 10–30 cm long, 0.6–1 mm wide, trigonous to rounded, smooth
Morphology Leaves
Leaf sheath brown, 1.7–4.5 cm long, often with a purplish base. Leaf blade narrowly linear, folded, 4.7–16.5 cm long, 0.8–1.1 mm wide, acute, glabrous Leaves up to 21 cm long.
Morphology Reproductive morphology Inflorescences Bracts
Involucral bracts leaf-like, ± spreading, 1–2, lowermost 3.8–9.5 cm long, 0.7–1.5 mm wide, glabrous to minutely scabrid
Morphology Reproductive morphology Inflorescences
Inflorescence loosely capitate.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets ± sessile, 2–5(–11) per head, ovoid, sometimes oblong-ovoid, 10–15.5 mm long, 2.8–3.8 mm wide, axis straight.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes brown to almost black, broadly ovate, 2.3–2.8 mm long, 2.5–2.6 mm wide, keel rounded, pale yellowish green, 2–3-veined, apex obtuse, glabrous
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 3.
Morphology Reproductive morphology Flowers Androecium Stamens Filaments
Filaments 2.1–2.5 mm long.
Morphology Reproductive morphology Flowers Androecium Stamens Anthers
Anthers 0.4–0.5 mm long
Morphology Reproductive morphology Flowers Gynoecium Stigma
Stigma 2-branched
Morphology Reproductive morphology Fruits
Nutlet black, ± obovoid to rounded, 0.9–1.2 mm long, 0.9–1.2 mm wide, strongly transversely wrinkled.
Ecology
In seasonally moist depression, (heavily grazed) wet grassland and in ditches at roadsides; 1000–1400 m, in Kenya up to 2300 m
Conservation
Least Concern (LC) due to distribution and habitat.
Distribution
Flora districts: K5 T4 T7 Range: Zambia, Madagascar

Native to:

Kenya, Madagascar, Tanzania, Zambia, Zimbabwe

Cyperus zonatissimus Kük. appears in other Kew resources:

First published in H.G.A.Engler (ed.), Pflanzenr., IV, 20(101): 395 (1936)

Not 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. [Cited as Pycreus zonatus.]
  • Govaerts, R. (1999). World Checklist of Seed Plants 3(1, 2a & 2b): 1-1532. MIM, Deurne. [Cited as Pycreus zonatus.]

Literature

Kew Backbone Distributions

  • Browning, J. & al. (2020). Flora Zambesiaca 14: 1-455. Royal Botanic Gardens, Kew.
  • Hoenselaar, K., Verdcourt, B. & Beentje, H. (2010). Cyperaceae Flora of Tropical East Africa: 1-466.

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