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This species is accepted, and its native range is Tanzania (Ufipa District).
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: Tanzania, Ufipa District: Sumbawanga, Nsangu Forest area, Robinson 4863 (K, holo.; out on loan)
Morphology General Habit
Perennial, up to 30 cm tall, with a 2–6 mm thick curving rhizome.
Morphology Culms
Culms solitary per rhizome node, 25–30 cm long, 1–2 mm wide, triangular, glabrous
Morphology Leaves
Leaf sheath brown or reddish brown, the upper greenish. Leaves up to 12 cm long. Leaf blade linear, flat, 8–12 cm long, 3.5–4.5 mm wide, scabrid on midrib and margin
Morphology Reproductive morphology Inflorescences Bracts
Involucral bracts leaflike, reflexed, 3–4, lowermost 5–6 cm long, 3–4 mm wide
Morphology Reproductive morphology Inflorescences
Inflorescence a solitary white with reddish tinge (turning straw-coloured or purplish) globose head 10–12 mm across, of a single spike.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets to 100 per spike, narrowly ovoid, 4.5–5.5 mm long, 1.5–2.5 mm wide, 1–2-flowered.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes white to reddish brown, lanceolate and concave, 4–5 mm long, prominently keeled and toothed, 2–4-veined on each side of the midrib
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 2
Morphology Reproductive morphology Fruits
Nutlet only seen immature (by Lye), ± 2 mm long.
Ecology
Seasonally damp ground at foot of rocky outcrop; ± 2000 m
Conservation
‘Very rare’ in its single locality; data deficient (DD) as no information exists on threats
Note
Maybe related to K. alba, but different in rhizome and glume colour.
Distribution
Flora districts: Known only from the type Flora districts: T4

Native to:

Tanzania

Cyperus rukwanus Huygh appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Robinson, E.A. [4863], Tanzania Kyllinga alba-purpurea K000416318 holotype

First published in Phytotaxa 166: 40 (2014)

Accepted by

  • Govaerts, R., Nic Lughadha, E., Black, N., Turner, R. & Paton, A. (2021). The World Checklist of Vascular Plants, a continuously updated resource for exploring global plant diversity. https://doi.org/10.1038/s41597-021-00997-6 Scientific Data 8: 215.

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