1. Family: Polygonaceae Juss.
    1. Genus: Oxygonum Burch. ex Campd.
      1. Oxygonum robustum Germish.

        This species is accepted, and its native range is Mozambique to KwaZulu-Natal.

    [FZ]

    Flora Zambesiaca. Vol. 9, Part 3. Polygonaceae-Myriaceae. Pope GV, Polhill RM, Martins ES. 2006.

    Habit
    Spreading robust perennial herb, arising from a thick vertical woody rootstock Spreading robust perennial herb, arising from a thick vertical woody rootstock.
    Stem
    Stems ± decumbent up to 50 cm tall, much branched from the base Stems ± decumbent up to 50 cm tall, much branched from the base.
    Leaves
    Leaves subsessile; lamina obovate to elliptic or spathulate 3.7–8 × 0.8–2.3 cm, acuminate and apiculate at the apex, attenuate and narrowing gradually into a petiole, entire or more rarely sharply toothed on the margins, glabrous, brown punctate; midrib prominent beneath, sometimes pubescent Leaves subsessile; lamina obovate to elliptic or spathulate 3.7–8 × 0.8–2.3 cm, acuminate and apiculate at the apex, attenuate and narrowing gradually into a petiole, entire or more rarely sharply toothed on the margins, glabrous, brown punctate; midrib prominent beneath, sometimes pubescent.
    Ocrea
    Ocrea 8–10 mm long, truncate and fringed with ± rigid bristles up to 10 mm long, puberulous to pilose outside, reddish-brown and brown punctate Ocrea 8–10 mm long, truncate and fringed with ± rigid bristles up to 10 mm long, puberulous to pilose outside, reddish-brown and brown punctate.
    Flowers
    Hermaphrodite flowers homostylous to slightly heterostylous; perianth white, tubular; tube 5 mm long; lobes up to 6 mm long Male flowers not seen Flowers 2–4, pedicellate in the axil of bracts, arranged in terminal and lateral spiciform racemes up to 30 cm long; pedicels up to 5 mm long, glabrous, articulate near the apex; bracts chartaceous, 4–8 mm long, obliquely truncate and produced dorsally into an acute subulate seta, brown punctate outside Flowers 2–4, pedicellate in the axil of bracts, arranged in terminal and lateral spiciform racemes up to 30 cm long; pedicels up to 5 mm long, glabrous, articulate near the apex; bracts chartaceous, 4–8 mm long, obliquely truncate and produced dorsally into an acute subulate seta, brown punctate outside. Male flowers not seen. Hermaphrodite flowers homostylous to slightly heterostylous; perianth white, tubular; tube 5 mm long; lobes up to 6 mm long.
    Filaments
    Filaments 4–5 mm long; anthers up to 1 mm long, oblong, reddish-brown
    Ovary
    Ovary up to 3 mm long, 3 angled; styles 3 mm, connate at the base
    Fruits
    Nut immature, 3 angled, up to 6 mm long, longitudinally ridged, ± narrowly winged, pubescent. Nut immature, 3 angled, up to 6 mm long, longitudinally ridged, ± narrowly winged, pubescent.
    Ecology
    Coastal grasslands.
    Distribution
    Also in South Africa (KwaZulu-Natal). Mozambique MOZ M
    Male
    Male flowers not seen.
    Hermaphrodite
    Hermaphrodite flowers homostylous to slightly heterostylous; perianth white, tubular; tube 5 mm long; lobes up to 6 mm long. Ovary up to 3 mm long, 3 angled; styles 3 mm, connate at the base. Filaments 4–5 mm long; anthers up to 1 mm long, oblong, reddish-brown.
    Stamens
    Filaments 4–5 mm long; anthers up to 1 mm long, oblong, reddish-brown.
    Pistil
    Ovary up to 3 mm long, 3 angled; styles 3 mm, connate at the base.

    Distribution

    Native to:

    KwaZulu-Natal, Mozambique

    Oxygonum robustum Germish. appears in other Kew resources:

    First published in Bothalia 17: 40 (1987)

    Accepted by

    • Pope, G.V., Polhill, R.M. & Martins, E.S. (eds.) (2006). Flora Zambesiaca 9(3): 1-277. Royal Botanic Gardens, Kew.
    • Germishuizen, G. & Meyer, N.L. (eds.) (2003). Plants of Southern Africa an annotated checklist Strelitzia 14: 1-1231. National Botanical Institute, Pretoria.

    Literature

    Flora Zambesiaca
    • Bothalia 17: 40, fig. 15 (1987).
    Kew Backbone Distributions
    • 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

    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