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  1. Family: Rubiaceae Juss.
    1. Genus: Rubia L.
      1. Rubia horrida (Thunb.) Puff

        This species is accepted, and its native range is S. Africa to Zimbabwe.

    [FZ]

    Rubiaceae, B. Verdcourt. Flora Zambesiaca 5:1. 1989

    Habit
    Stems to c. 2–3 m. long, distinctly 4-ribbed, with recurved prickles on ribs, younger parts often with short hairs below nodes, occasionally also with some short whitish hairs between ribs.
    Leaves
    Leaves in whorls of 6–8(12), blades 10–50(70) x 2–8(10) mm., lanceolate, linear-lanceolate to linear, mostly narrowed to base, blades occasionally difficult to distinguish from faintly winged petioles, acute at apex, only midvein prominent; margins and midvein below with recurved prickles, seldom scabrid above; petioles 10–25(40) mm. long, ± 3-angular in section or somewhat canaliculate, mostly with (2 rows of) recurved prickles.
    Inflorescences
    Inflorescence several- to many-flowered, rather lax to ± dense; peduncles and pedicels 1–6 mm. long, glabrous or sometimes hairy; ultimate bracts c. 2–5 mm. long, linear.
    Flowers
    Flowers 5 (very rarely 4 or 6) -merous; corolla 3–6 mm. in diam.; filaments to 0.6 mm., anthers to 0.5 mm. long; ovary c. 0.4–0.8 mm. long.
    Fruits
    Fruit blackish or dark purple, each mericarp 2.5–3.5 mm. in diam.

    Distribution

    Doubtfully present in:

    Swaziland

    Native to:

    Botswana, Cape Provinces, Free State, KwaZulu-Natal, Namibia, Northern Provinces, Zimbabwe

    Synonyms

    Other Data

    Rubia horrida (Thunb.) Puff appears in other Kew resources:

    Bibliography

    First published in Kew Bull. 32: 432 (1978)

    Accepted by

    • Govaerts, R. (2003). World Checklist of Selected Plant Families Database in ACCESS: 1-216203. The Board of Trustees of the Royal Botanic Gardens, Kew.

    Literature

    Kew Backbone Distributions

    • Ruhsam, M in Ruhsam, M. (2005). Survey of all the Rubiaceae specimens at the Royal Botanic Gardens, Kew.

    Sources

    Flora Zambesiaca
    Flora Zambesiaca
    http://creativecommons.org/licenses/by-nc-sa/3.0

    Kew Backbone Distributions
    The International Plant Names Index and World Checklist of Selected Plant Families 2020. 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 2020. 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