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This species is accepted, and its native range is N. Uganda, S. DR Congo to Zambia.
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: Zambia: Mpulungu– Mbala [Abercorn] Road close to Tsetse control, Richards 725 (K!, holo.)
Morphology General Habit
Slender annual, up to 17 cm high.
Morphology Culms
Culm 16 cm long, 0.4 mm wide, trigonous, smooth
Morphology Leaves
Leaves up to 15 cm long. Leaf sheath 1.5–2.5 cm long, (reddish-)brown. Leaf blade narrowly linear, folded, 8.5–12.5 cm long, 0.8 mm wide, acute, glabrous
Morphology Reproductive morphology Inflorescences Bracts
Involucral bracts 2: lowermost leaf-like, ± erect, 3.2–6.5 cm long, 0.8 mm wide; second glume-like
Morphology Reproductive morphology Inflorescences
Inflorescence capitate.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets 1–6 per head, broadly ovoid, 5–7 mm long, 3–4 mm wide, axis straight.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes bright yellow, apex black, broadly ovate, papyraceous, 2.9–3 mm long, 2.6–3 mm wide, keel acute, 2-veined, apex acute to acuminate
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 2–3.
Morphology Reproductive morphology Flowers Androecium Stamens Filaments
Filaments 2.1–2.7 mm long.
Morphology Reproductive morphology Flowers Androecium Stamens Anthers
Anthers 0.4 mm long
Morphology Reproductive morphology Flowers Gynoecium Stigma
Stigma 2-branched
Morphology Reproductive morphology Fruits
Nutlet brown, obovoid, ± biconvex, 1.3 mm long, 0.9 mm wide, coarsely papillose in longitudinal rows.
Ecology
In shallow pools, damp places, at water edges; 1350–1650 m
Conservation
Probably Least Concern (LC) due to its distribution and habitat.
Note
P. melanacme is characterized by the striking yellow glume with black apex.
Distribution
Range: Congo-Kinshasa, Zambia Flora districts: U1

Native to:

Uganda, Zambia, Zaïre

Cyperus melanacme (Nelmes) Raymond appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Richards, H. M. [725], Zambia Pycreus melanacme K000362991
Richards, H. M. [725], Zambia Pycreus melanacme K000362990 Unknown type material

First published in Naturaliste Canad. 91: 129 (1964)

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 melanacme.]
  • Govaerts, R. (1999). World Checklist of Seed Plants 3(1, 2a & 2b): 1-1532. MIM, Deurne. [Cited as Pycreus melanacme.]

Literature

Kew Backbone Distributions

  • 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

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