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This species is accepted, and its native range is Tanzania (Ufipa).

[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: hill NW of Tatanda Mission, 23 June 1996, Faden et al. 96/376 (K!, holo.; EA, NHT, US, iso.)
Morphology General Habit
Perennial up to 1 m tall, with short rhizome and swollen culm bases.
Morphology Culms
Culms moderately tufted, 77–95 cm long, 1.9–2.8 mm wide, terete, smooth, base slightly swollen
Morphology Leaves
Leaf sheath brownish, 2–13 cm long, completely enclosing the culm on cauline leaves. Leaves mostly basal, 1–3 cauline near the base; up to 29 cm long. Leaf blade very narrowly ovate, flat, 10–16.5 cm long, 6–8 mm wide, margins minutely scabrid, gradually tapering to an acute or acuminate apex
Morphology Reproductive morphology Inflorescences Bracts
Involucral bracts leaf-like, spreading, 3–7, lowermost 3.4–7 cm long, 5.5–7 mm wide, margins scabrid at the tip
Morphology Reproductive morphology Inflorescences
Inflorescence congested capitate, 1–1.4 × 2–2.5 cm.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets in 10–15 per inflorescence, ovoid to narrowly ovoid, 10–15 mm long, 4–6 mm wide, flattened, rachilla straight, dorsiventrally broad with thick raised margins.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes mid-brown, ovate, 6–8.7 mm long, 1.5–3.5 mm wide, sides chartaceous, 6–7-veined on each side, keel mid-brown, apex with mucro up to 1 mm long
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 3.
Morphology Reproductive morphology Flowers Androecium Stamens Filaments
Filaments 5–6.4 mm long.
Morphology Reproductive morphology Flowers Androecium Stamens Anthers
Anthers 2.5–3.5 mm long
Morphology Reproductive morphology Fruits
Nutlet greyish to reddish-brown, shiny, ellipsoid to ellipsoid-obovoid, trigonous with flat to slightly concave sides, 1.8–2.4 mm long, 1.3–1.6 mm wide, smooth.
Ecology
Brachystegia woodland; 1700–1900 m
Conservation
Known from only two collections in close proximity of each other, in an area which seems to be experiencing a decline in habitat due to tree cutting. Therefore this taxon is assessed as Endangered (EN B2a,b.iii).
Distribution
Flora districts: T4 Range: Not known anywhere else

[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
Known from only one specimen in an area which seems to be experiencing a decline in habitat quality due to tree cutting. Therefore, we assess the taxon as Endangered (EN) using the criteria set out by IUCN (2001): ENB2ab(iii).
Distribution
Tanzania.
Ecology
Brachystegia woodland, now heavily cut; c. 1880 m.
Morphology Culms
Culms moderately tufted, 77 - 85 cm x 2 - 2.5 mm, terete, smooth, greenish, base slightly swollen, dark brown
Morphology General Habit
Shortly rhizomatous perennial
Morphology Leaves
Leaves mostly basal, 1 - 3 cauline towards the base of culm; blade very narrowly ovate, 10 - 14 cm x 6 - 8 mm, gradually tapering to an acute or acuminate apex, flat in cross-section, margins minutely scabrid, green; sheath 2 - 11 cm long, brownish, completely enclosing culm on cauline leaves
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 3; anthers not seen; filaments up to 5 mm long
Morphology Reproductive morphology Flowers Gynoecium Stigma
Stigmas 3
Morphology Reproductive morphology Fruits
Nutlets elliptic to elliptic-obovate, trigonous with flat to slightly concave sides, 2 - 2.4 x 1.4 - 1.6 mm, maturing greyish to reddish-brown, shiny, smooth.
Morphology Reproductive morphology Inflorescences
Inflorescence congested capitate, 1 - 1.4 x 2 - 2.5 cm
Morphology Reproductive morphology Inflorescences Bracts
Involucral bracts 3 - 7, leaf-like, the longest 3.4 - 5 cm long, margins scabrid at tip
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes c. 10 per spikelet, ovate, 6 - 7 x 1.5 - 2 mm, ± acute with mucro to 1 mm long, sides chartaceous, indistinctly 6 - 7-nerved on each side, mid-brown, somewhat shiny, keel similar
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets 10 - 15 per inflorescence, ovate to narrowly ovate, 10 - 12 x 4 - 6 mm, flattened, rachilla straight, dorsiventrally broad with thick, raised margins
Note
Named for the type locality. Cyperus tatandaensis is closely related to C. margaritaceus from which it differs in having broader leaves and narrower nutlets. This close affinity suggests that our new species belongs to a group of taxa placed by Kiukenthal (1936) in sect. Platystachyi Kunth. These taxa are generally characterised by having rather broad spikelets with white, yellow/orange or reddish chartaceous glumes. Indeed the glume coloration could make them of horticultural interest, although none of them appear yet to be in cultivation.
Type
Tanzania, Faden, Phillips, Muasya & Macha 96/376 (holotypus K!; isotypi EA!, NHT!, US!).

Native to:

Tanzania

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

Date Reference Identified As Barcode Type Status
Bidgood, S. [5653], Tanzania K000468771

First published in Kew Bull. 59: 595 (2004)

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.
  • 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

  • K.B. 59 (4): 595 (2004).

Flora of Tropical East Africa
Flora of Tropical East Africa
http://creativecommons.org/licenses/by-nc-sa/3.0

Herbarium Catalogue Specimens

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