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This species is accepted, and its native range is SW. Uganda to E. DR Congo.

[FTEA]

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

Type
Type: Congo-Kinshasa, Kahuzi Massif, W of Lake Kivu, Humbert 7722 (BR!, P, syn.) & Karisimbi Volcano, NE of Lake Kuvi, Humbert 8586 (P, syn.)
Morphology General Habit
Perennial, with a short or long rhizome and roots surrounded by a sheath of persistent root-hairs, up to 44 cm high.
Morphology Culms
Culms tufted, rounded, with distinct deep longitudinal ridges, 20–35 cm long, 0.5–0.6 mm wide, glabrous, the base surrounded by greyish or brown non-fibrous scales
Morphology Leaves
Leaf blade linear, 14–25 cm long, 1.1–1.5 mm wide, V-shaped or with inrolled margins, apex acuminate, glabrous Leaf sheath brown, 1.5–4 cm long. Leaves up to 26 cm long.
Morphology Reproductive morphology Inflorescences Bracts
First bract of the inflorescence leaf-like, sheath 1.1–1.3 cm long, blade 6.3–6.7 cm long, 0.8–1.2 mm wide
Morphology Reproductive morphology Inflorescences
Inflorescence a slender panicle, primary branches few, distant, 2–6 cm long.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets solitary or in small clusters of 2–3 at the end of 1.4–2 cm long branches, ovoid, 5–6.5 mm long, 1.2–1.8 mm wide.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes 5–6 per spikelet, brown, elliptic-lanceolate, the lower 2–3 empty, elliptic-lanceolate, 1.2–4.5 mm long, 0.8–2 mm wide, upper 2 glumes with bisexual flowers, 4–6 mm long, 1.7–2 mm wide, glabrous, apex obtuse to acute
Morphology Reproductive morphology Flowers Perianth
Perianth bristles 3 short, 3 long, 2.2–3.2 mm long, occasionally with a few scattered hairs at the very base
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 3.
Morphology Reproductive morphology Flowers Androecium Stamens Filaments
Filaments 3.4–4.8 mm long.
Morphology Reproductive morphology Flowers Androecium Stamens Anthers
Anthers 1.4–2.2 mm long
Morphology Reproductive morphology Fruits
Nutlet pale brown, ellipsoid-lanceolate, 2.8–3.1 mm long, 0.8–1 mm wide, minutely papillose-reticulate
Figures
Fig. 55, p 368
Ecology
In montane or afro-alpine bogs; 2400–3300 m
Conservation
This species has a rather small extent of occurrence and area occupancy, but does not seem to be under threat.
Note
This species is closely related to Carpha eminii, but differs in its shorter and less hairy perianth bristles and having 2 fertile flowers in each spikelet.
Distribution
Flora districts: U2 Range: Congo-Kinshasa, Rwanda

Native to:

Rwanda, Uganda, Zaïre

Carpha angustissima Cherm. appears in other Kew resources:

First published in Bull. Soc. Bot. France 82: 341 (1935)

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.
  • 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

Flora of Tropical East Africa

  • Bull. Soc. Bot. Fr. 82: 341 (1935)
  • Haines & Lye, Sedges & Rushes E. Afr.: 322 (1983).

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