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This species is accepted, and its native range is Tanzania 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: Tanzania, Songea District: Matagoro Hills, 3 Feb. 1956, Milne-Redhead & Taylor 8595 (K!, holo.; BM, BR, iso.)
Morphology General Habit
Perennial up to 55 cm tall, with short rhizome.
Morphology Culms
Culms moderately to densely tufted, 30–50 cm long, 0.7–0.9 mm wide, trigonous, smooth, densely covered at base by fibrous, dark reddish-brown to blackish leaf sheath remains
Morphology Leaves
Leaf sheath brownish, 1.5–2 cm long. Leaves up to 32 cm long. Leaf blade narrowly linear, v-shaped in crosssection, 17–30 cm long, 0.5–0.7 mm wide, scabrid on the margins, apex acute
Morphology Reproductive morphology Inflorescences Bracts
Involucral bracts leaf- like, spreading, 3–4, lowermost 1.5–2.2 cm long
Morphology Reproductive morphology Inflorescences
Inflorescence simple, primary branches 3–4, 0.5–3 cm long.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets in digitate clusters, at the end of primary branches, 2–4 per cluster, elliptic-lanceolate to lanceolate, 8–10 mm long, 2–3 mm wide, rachilla straight.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes dark reddish-brown with pale brown margins, ovate, 2.3–2.7 mm long, 0.5–0.7 mm wide, sides membraneous, 1-veined on each side, keel green, apex acute
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 3.
Morphology Reproductive morphology Flowers Androecium Stamens Anthers
Anthers 1.3–1.5 mm long
Morphology Reproductive morphology Fruits
Nutlet dark reddish, ellipsoid, trigonous, 1.3–1.6 mm long, 0.6–0.8 mm wide, minutely papillose.
Ecology
Woodland, shallow soils overlying rocks; 1400–2100 m
Conservation
Data Deficient (DD); although several specimens have been collected there is no information about the status of the habitats in which the plants occur.
Distribution
Flora districts: T4 T7 T8 Range: Zambia

[KBu]

Simpson, D., & Muasya, A. (2004). Three New Species of Cyperus (Cyperaceae) from Eastern and Southern Africa. Kew Bulletin, 59(4), 593-598. doi:10.2307/4110917

Conservation
We assess this plant as Data Deficient (DD) using the IUCN criteria (IUCN 2001). Although several specimens have been collected we have no information about the status of the habitats in which the plants occur.
Ecology
Woodland, grassland, dry stream banks, shallow soils overlying rocks; 1410 - 2100 m.
Morphology Culms
Culms moderately to densely tufted, 30 - 50 cm x 0.7 - 0.9 mm, trigonous, smooth, green, densely covered at base by fibrous, dark reddish-brown to blackish leaf sheath remains
Morphology General Habit
Shortly rhizomatous perennial
Morphology Leaves
Leaf blade narrowly linear, 17 - 30 cm x 0.5 - 0.7 mm, gradually tapering to an acute apex, v-shaped in cross-section, margins scabrid, green; sheath 1.5 - 2 cm long, brownish
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 3; anthers 1.3 - 1.5 mm long
Morphology Reproductive morphology Flowers Gynoecium Stigma
Stigmas 3
Morphology Reproductive morphology Fruits
Nutlets elliptic, trigonous with slightly convex sides, 1.3 - 1.6 x 0.6 - 0.8 mm, maturing dark reddish, minutely papillose.
Morphology Reproductive morphology Inflorescences
Inflorescence with simple branching, lax to congested in young plants, 2.5 - 3.5 cm long; primary branches 3 - 4, 0.5 - 3 cm long
Morphology Reproductive morphology Inflorescences Bracts
Involucral bracts 3 - 4, leaf-like, the longest 1.5 - 2.2 cm long, margins scabrid
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes 12 - 18 per spikelet, ovate, 2.3 - 2.7 x 0.5 - 0.7 mm, ± acute, sides membranous, 1-nerved on each side, dark reddish-brown with pale brown margins, keel green
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets in digitate clusters, 2 - 4 per cluster, elliptic-lanceolate to lanceolate, 8 - 10 x 2 - 3 mm, flattened, mid-reddish-brown, rachilla straight
Note
Named for the type locality. Cyperus matagoroensis is closely related to Cyperus nyererei which was fairly recently described by Lye (1983). Our new species differs in having narrower leaves, longer inflorescence branches, mid-reddish- brown spikelets and shorter glumes.
Type
Tanzania, Milne- Redhead & Taylor 8595 (holotypus K!; isotypi BM, BR).

Native to:

Tanzania, Zambia

Cyperus matagoroensis Muasya & D.A.Simpson appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Milne-Redhead [8595], Tanzania K000743732 holotype

First published in Kew Bull. 59: 593 (2004)

Accepted by

  • Browning, J. & al. (2020). Flora Zambesiaca 14: 1-455. Royal Botanic Gardens, Kew.
  • Govaerts, R. & Simpson, D.A. (2007). World Checklist of Cyperaceae. Sedges: 1-765. The Board of Trustees of the Royal Botanic Gardens, Kew.
  • Hoenselaar, K., Verdcourt, B. & Beentje, H. (2010). Cyperaceae Flora of Tropical East Africa: 1-466.

Literature

Kew Bulletin

  • Haines, R. W. & Lye, K. (1983). Sedges and Rushes of East Africa. East African Natural History Society, Nairobi.
  • IUCN (2001). IUCN Red List categories: Version 3.1. IUCN Species Survival Commission, Gland, Switzerland and Cambridge, U.K.
  • Kükenthal, G. (1936). Cyperaceae - Scirpoideae - Cypereae. In: A. Engler (ed.), Das Pflanzenreich, IV 20, 101 Heft. Engelmann, Leipzig.
  • Lye, K. A. (1983). Studies in African Cyperaceae 25. New taxa and combinations in Cyperus. Nordic J. Bot. 3: 213-232.

Flora of Tropical East Africa

  • KB 59 (4): 593 (2004).

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 Bulletin
Kew Bulletin
http://creativecommons.org/licenses/by-nc-sa/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