Skip to main content
This species is accepted, and its native range is Chad to KwaZulu-Natal, Madagascar.
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: Madagascar, Baron 4456 (K!, holo.)
Morphology General Habit
Perennial, robust, up to 95 cm tall.
Morphology Culms
Culms tufted, 76–90 cm long, 5–7 mm wide, triquetrous to slightly winged, smooth
Morphology Leaves
Leaves up to 23 long. Leaf blade absent or 1 cm long maximum Leaf sheath reddishbrown, 5–23 cm long.
Morphology Reproductive morphology Inflorescences Bracts
Involucral bracts bract- to leaf-like, 1(–2), erect, sometimes giving the inflorescence a lateral appearance, 1–4 cm long, 2–5 mm wide
Morphology Reproductive morphology Inflorescences
Inflorescence almost capitate or simple anthela, primary branches 4–13, 1–6 cm long.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets in digitate clusters, sessile or at the end of primary branches, 2–7(–10) per cluster, linear-lanceolate, 4.8–12 mm long, 1–2 mm wide, rachis straight.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes dark reddish-brown to almost black, ovate, 1.7–2 mm long, 0.8–1 mm wide, keel acute, apex slightly excurrent
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 3.
Morphology Reproductive morphology Flowers Androecium Stamens Filaments
Filaments 1.7–1.8 mm long.
Morphology Reproductive morphology Flowers Androecium Stamens Anthers
Anthers 0.9–1 mm long
Morphology Reproductive morphology Fruits
Nutlet only seen immature.
Ecology
Mainly in wet areas, swamps, bordering lakes and ponds; (950–)1100–2950 m
Conservation
Least Concern (LC) due to its wide distribution and common habitat.
Note
Haines & Lye have platicaulis as a synonym of denudatus var. lucentinigricans [“a robust perennial very similar to var. denudatus, but differing in the more sharply triangular to almost winged culms up to 8 mm thick; slightly smaller and narrower spikelets, usually darker glumes up to 2 mm long; roots also more frequently reddish than in var. denudatus”]. Very close to denudatus and sometimes classified as a subspecies, but differences are large enough to recognize as separate species.
Distribution
Range: Madagascar Flora districts: U2 U3 K3 K4 K5T1 T2 T3 T4 T7 T8

Native to:

Angola, Botswana, Burundi, Chad, Congo, Kenya, KwaZulu-Natal, Madagascar, Malawi, Northern Provinces, Rwanda, Sudan, Tanzania, Uganda, Zambia, Zaïre, Zimbabwe

Cyperus platycaulis Baker appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Speke [s.n.], Tanzania K000321434 Unknown type material
Bidgood, S. [5544], Tanzania K000468880

First published in J. Linn. Soc., Bot. 22: 532 (1887)

Accepted by

  • Boudet, G., Lebrun, J.P. & Demange, R. (1986). Catalogue des plantes vasculaires du Mali: 1-465. Etudes d'Elevage et de Médecine Vétérinaire des Pays Tropicaux.
  • 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.
  • 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

Kew Backbone Distributions

  • 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.
  • Figueiredo, E. & Smith, G.F. (2008). Plants of Angola Strelitzia 22: 1-279. National Botanical Institute, Pretoria.
  • Sita, P. & Moutsambote, J.-M. (2005). Catalogue des plantes vasculaires du Congo, ed. sept. 2005: 1-158. ORSTOM, Centre de Brazzaville.

Flora of Tropical East Africa

  • E.P. 4, 20 (101): 253 (1936).
  • J.L.S., Bot. 22: 532 (1887)

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