1. Family: Polygonaceae Juss.
    1. Genus: Oxygonum Burch. ex Campd.
      1. Oxygonum fruticosum Dammer ex Milne-Redh.

        This species is accepted, and its native range is S. DR Congo to Angola.

    [FZ]

    Polygonaceae, I. Nogueira, S. Ortiz & J.A.R. Paiva. Flora Zambesiaca 9:3. 2006

    Habit
    A shrub or scrambling plant from a woody rootstock, ± pubescent.
    Stem
    Stems sometimes much branched; branches ascending; bark red-brown.
    Leaves
    Leaves sessile, dull green, 2–6.8 × 0.3–1.3(1.7) cm, elliptic-lanceolate, acute at the apex often mucronate, attenuate to the base, entire or slightly sinuous on the margin, with the midrib prominent beneath, ± pubescent and punctate with black dots on both surfaces.
    Ocrea
    Ocrea 10–15 mm long, chartaceous, thinly covered with short hairs, truncate and fringed with red-brown setae c. 8 mm long at the apex.
    Flowers
    Flowers pedicellate, 1–3 in the axils of bracts, arranged in terminal spiciform rigid racemes c. 25 cm long; bracts 7–10 mm long, chartaceous, obliquely truncate and produced dorsally into an acute or acuminate setose apex, glabrous or ± puberulous; bracteoles 2, c. 5 mm long, hyaline with 1–2 short setae at the apex; pedicels c. 6 mm long, articulated near the apex. Male flowers not seen. Hermaphrodite flowers heterostylous; perianth wine-red outside and white inside, tubular with 5 spreading lobes; tube 6–8 mm long and slightly constricted at the apex; lobes 5–8 mm long, oblong-lanceolate or oblong-oblanceolate, acute or apiculate at the apex.
    Male
    Male flowers not seen.
    Stamens
    Filaments (1.5)4–11 mm long, filiform; anthers 1–1.3 × 0 4–0.5 mm.
    Pistil
    Ovary 7–8 mm long, ellipsoid, glabrous; styles of long-styled flowers 6–7 mm long; styles of short-styled flowers 4–5 mm shorter than the stamens.
    Hermaphrodite
    Ovary 7–8 mm long, ellipsoid, glabrous; styles of long-styled flowers 6–7 mm long; styles of short-styled flowers 4–5 mm shorter than the stamens. Filaments (1.5)4–11 mm long, filiform; anthers 1–1.3 × 0 4–0.5 mm. Hermaphrodite flowers heterostylous; perianth wine-red outside and white inside, tubular with 5 spreading lobes; tube 6–8 mm long and slightly constricted at the apex; lobes 5–8 mm long, oblong-lanceolate or oblong-oblanceolate, acute or apiculate at the apex.
    Fruits
    Nut red-brown at maturity, 9–12 × 4–5 mm, oblong-ellipsoid, glabrous, longitudinally sulcate and transversally wrinkled.

    Images

    Distribution

    Native to:

    Angola, Zambia, Zaïre

    Oxygonum fruticosum Dammer ex Milne-Redh. appears in other Kew resources:

    First published in Bull. Misc. Inform. Kew 1933: 142 (1933)

    Accepted by

    • Figueiredo, E. & Smith, G.F. (2008). Plants of Angola Strelitzia 22: 1-279. National Botanical Institute, Pretoria.
    • Pope, G.V., Polhill, R.M. & Martins, E.S. (eds.) (2006). Flora Zambesiaca 9(3): 1-277. Royal Botanic Gardens, Kew.

    Literature

    Kew Backbone Distributions
    • Figueiredo, E. & Smith, G.F. (2008). Plants of Angola Strelitzia 22: 1-279. National Botanical Institute, Pretoria.
    • Pope, G.V., Polhill, R.M. & Martins, E.S. (eds.) (2006). Flora Zambesiaca 9(3): 1-277. Royal Botanic Gardens, Kew.

    Sources

    Flora Zambesiaca
    Flora Zambesiaca
    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 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