1. Family: Cyperaceae Juss.
    1. Genus: Tetraria P.Beauv.
      1. Tetraria usambarensis K.Schum.

        This species is accepted, and its native range is DR Congo, Tanzania (Usambara Mountains).

    [FTEA]

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

    Type
    Type: Tanzania, Usambara Mountains, Holst 131 (B†, holo)
    Habit
    Slender perennial, up to 60 cm tall; rounded base enclosed in black fibres, the remains of old leaf bases.
    Culms
    Culms tufted, rounded-trigonous, 10–50 cm long, 0.5–1.5 mm wide, with longitudinal ridges, glabrous
    Leaves
    Leaves basal and up the stem. Leaf sheaths blackened, 3.5–5 cm long; basal leaves shorter than culm; cauline leaves linear, involute, flexuous above, 27–33 cm long, 1.2–2 mm wide, some exceeding the culm, rigid, apex often blackened, acuminate, scabrid
    Inflorescences
    Inflorescence a simple panicle, 5–15 cm long.
    Spikelets
    Spikelets 1–5 per cluster, ovoid, 5–10 mm long, 1.5–3.5 mm wide.
    Glume
    Glumes 8–11 per spikelet, distichously arranged, brown, lower 7–9 empty, ovateelliptic, 4.5–5 mm long, 2.5–3.5 mm wide, awned, upper 2 subtending bisexual flowers, ovate, 5.5–7 mm long, 1.5–3 mm wide, keel 1-veined ending in the acuminate to awned apex
    Perianth
    Perianth bristles 3–6, minute, scabrid
    Stamens
    Stamens 3.
    Filaments
    Filaments 5–6 mm long.
    Anthers
    Anthers 4–4.5 mm long, with conspicuous flat elongate connectives far exceeding the anthers
    Style
    Style long, flexuous, base pyramidal, hispidulous, persistent, branches 3, densely hairy
    Fruits
    Nutlet brown, ovoid-ellipsoid to obovoid, 3–4 mm long, 1.5–1.8 mm wide, with 3 strong pale-coloured ribs, on a stalk ± 1 mm long
    Ecology
    Dry sandy places; 1750 m
    Distribution
    Range: Not known elsewhere Flora districts: T3

    Distribution

    Native to:

    Tanzania

    Tetraria usambarensis K.Schum. appears in other Kew resources:

    First published in H.G.A.Engler, Pflanzenw. Ost-Afrikas, C: 128 (1895)

    Accepted by

    • 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. (2004). World Checklist of Monocotyledons Database in ACCESS: 1-54382. The Board of Trustees of the Royal Botanic Gardens, Kew.

    Literature

    Kew Backbone Distributions
    • Hoenselaar, K., Verdcourt, B. & Beentje, H. (2010). Cyperaceae Flora of Tropical East Africa: 1-466.
    Flora of Tropical East Africa
    • Sedges & Rushes E. Afr.: 320 (1983).
    • P.O.A. C: 128 (1895)

    Sources

    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 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