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This species is accepted, and its native range is Kenya to Mozambique.

[FTEA]

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

Type
Type: Tanzania, Lushoto District, W Usambaras, Holst 3832 (B†, lecto., K!, fragment) (chosen by Nelmes)
Habit
Tufted perennial with thick rhizome, 0.5–2 m tall; basal leaf sheaths dark purple
Leaves
Leaf-blades 30–70 cm long, 6–10 mm wide, flat or plicate, scabrid at least at apex
Inflorescences
Inflorescence medium brown, of 8–20 long and drooping spikes arising in pairs from the leaf sheaths, often branched with 1–6 much smaller spikes at base of the main spikes; main spikes 2–20 cm long, 4–8 mm wide, usually all male at top, longest peduncles 3–7 cm long; smaller spikes at base of main spikes up to 1.5 cm long.
Glume
Glumes brownish red with broad green midrib, obovate to ovate-lanceolate with excurrent scabrid midrib, 4–6 mm long
Fruits
Utricles greenish to brown and often speckled dark reddish brown, 4–6 mm long including 1–1.5(–2) mm long scabrid beaks, distinctly longitudinally ribbed; beak distinctly toothed.
Ecology
Damp or swampy places in forest or forest edges of Hagenia bamboo etc, Erica zone, riverine forest; 1000–3300 m
Note
Nelmes suggested that the three specimens cited by K. Schumann in 1895 probably represented 2 or 3 species, having borrowed the original material from Berlin. Napper distinguishes C. greenwayi from C. vallis-rosetto by the former having a straight utricle and the latter having them conspicuously bent at the base of the beak; but there may be confusion with the closely related C. cyrtosaccus which has a bent utricle, although Napper does not mention it. I am not convinced C. cyrtosaccus and C. vallis-rosetto are distinct. See also sp. 22.
Distribution
Range: Not known elsewhere Flora districts: K3 K4 T2 T3 T6 T7

[FTEA]

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

Type
Type: Malawi, Mt Mlanji, Whyte s.n. (K!, lecto.)(Note:C.B. Clarke cited three Whyte specimens, one from Mt Mlanji, one from Mt Malosa and one from Mt Zomba; Haines and Lye give “the type” as Mt Mlanji, Whyte s.n. at K and this is taken as a lectotypification.)
Habit
Densely tufted perennial with thick rhizome, 0.4–1.7 m tall.
Leaves
Leaf-blades 20–80 cm long, 4–13 mm wide, flat or slightly plicate, ± scabrid Leaf sheaths purple or spotted purple
Inflorescences
Upper 1–3 spikes usually entirely male, the lower usually female with short male area at the tip. Inflorescence of 10–24 pale greyish brown spikes arising in pairs or threes (less often solitary) (3–)7–1(–10) cm long, 7–12 mm wide, sometimes with 1–3 smaller spikes at the base of the larger spikes.
Glume
Glumes reddish brown or speckled, with paler midrib, ovate-lanceolate, 4–6 mm long, with excurrent scabrid midrib
Fruits
Utricle green often densely speckled dark purplish, 4–6 mm long (including the 1 mm long smooth or scabrid beak), strongly curved; beak with divaricate teeth.
Ecology
Bogs and streamside in montane forest ( Hagenia etc.) and grassland; 1800–2700 m
Note
Many specimens from the Poroto Mts with the spikes arising singly from the lower leaf sheaths have been separated as sp. B; but this and C. cyrtosaccus may perhaps not be distinct from C. vallis-rosetto. Nelmes states that Kükenthal had written up sheets at Berlin as C. vallisrosetto var. cyrtosaccus but this was apparently not published. The epithet cyrtostachys also appears in Fl. Br. India 6: 714 (1894) but is a typographical error for C. cryptostachys Brongn. 1828.
Distribution
Range: Malawi Flora districts: T3 T7

Native to:

Kenya, Malawi, Mozambique, Tanzania

Carex vallis-rosetto K.Schum. appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Oct 17, 2005 Greenway, P.J. [3540], Tanzania K000363447 Unknown type material
Holst, C. [3823], Tanzania K000363446 lectotype
Feb 21, 1899 Whyte, A. [s.n.], Malawi Carex cyrtosaccus K000363564
Feb 21, 1899 Whyte, A. [s.n.], Malawi Carex cyrtosaccus K000363565 lectotype
Feb 21, 1899 Whyte, A. [s.n.], Malawi Carex cyrtosaccus K000363563

First published in H.G.A.Engler, Pflanzenw. Ost-Afrikas, C: 130 (1895)

Accepted by

  • Browning, J. & al. (2020). Flora Zambesiaca 14: 1-455. Royal Botanic Gardens, Kew.
  • Escudero, M. & Luceño, M. (2011). Taxonomic revision of the tropical African group of Carex subsect. Elatae (sect. Spirostachyae, Cyperaceae) Anales del Jardin Botanico de Madrid 68: 225-247.
  • Gehrke, B. (2011). Synopsis of Carex (Cyperaceae) from sub-Saharan Africa and Madagascar Botanical Journal of the Linnean Society 166: 51-99.
  • Hoenselaar, K., Verdcourt, B. & Beentje, H. (2010). Cyperaceae Flora of Tropical East Africa: 1-466.
  • 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.

Literature

Kew Backbone Distributions

  • Browning, J. & al. (2020). Flora Zambesiaca 14: 1-455. Royal Botanic Gardens, Kew.
  • Escudero, M. & Luceño, M. (2011). Taxonomic revision of the tropical African group of Carex subsect. Elatae (sect. Spirostachyae, Cyperaceae) Anales del Jardin Botanico de Madrid 68: 225-247.
  • Gehrke, B. (2011). Synopsis of Carex (Cyperaceae) from sub-Saharan Africa and Madagascar Botanical Journal of the Linnean Society 166: 51-99.

Flora of Tropical East Africa

  • Haines & Lye, Sedges & Rushes E. Afr.: 381, fig. 787 (1983).
  • J. E.Afr. Nat. Hist. Soc. 24 (106): 9 (1963)
  • F.D.O.A. 1: 539 (1938)
  • K.B. 1938: 244 (1938)
  • N.B.G.B. 9: 314 (1925)
  • E.P. IV 20 Cyp-Car.: 647 (1909)
  • F.T.A. 8: 521 (1902)
  • P.O.A. C: 130 (1895)

Flora of Tropical East Africa
Flora of Tropical East Africa
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Herbarium Catalogue Specimens
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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