1. Family: Cyperaceae Juss.
    1. Genus: Carex L.
      1. Carex vallis-rosetto K.Schum.

        This species is accepted, and its native range is Tanzania to Malawi.

    [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

    Images

    Distribution

    Native to:

    Malawi, 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

    • 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
    • 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)

    Sources

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

    Herbarium Catalogue Specimens
    'The Herbarium Catalogue, Royal Botanic Gardens, Kew. Published on the Internet http://www.kew.org/herbcat [accessed on Day Month Year]'. Please enter the date on which you consulted the system.
    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 2019. 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 2019. 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