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

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

    [FZ]

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

    Type
    Type:Zambia, Mwinilunga, sandy plain east of Mwinilunga, Milne-Redhead 1115 (K, holotype).
    Ocrea
    Ocrea 10–12 mm long, chartaceous, truncate and fringed at the apex with light brown setae 5–10 mm long Ocrea 10–12 mm long, chartaceous, truncate and fringed at the apex with light brown setae 5–10 mm long.
    Flowers
    Hermaphrodite flowers heterostylous, long-styled flowers not seen; perianth 4–5-lobed; tube c. 4 mm long; lobes white to rose, c. 6 mm long, oblong-lanceolate Male flowers not seen Flowers pedicellate, 3–4 in the axils of bracts, arranged in terminal spiciform racemes up to 30 cm long; bracts up to 6 mm long, truncate, produced dorsally into an acute or acuminate setose apex with a terminal fringe of 2–3 setae; pedicels up to 7 mm long, filiform Flowers pedicellate, 3–4 in the axils of bracts, arranged in terminal spiciform racemes up to 30 cm long; bracts up to 6 mm long, truncate, produced dorsally into an acute or acuminate setose apex with a terminal fringe of 2–3 setae; pedicels up to 7 mm long, filiform. Male flowers not seen. Hermaphrodite flowers heterostylous, long-styled flowers not seen; perianth 4–5-lobed; tube c. 4 mm long; lobes white to rose, c. 6 mm long, oblong-lanceolate.
    Filaments
    Filaments c. 1–2 mm long, filiform and flattened to the base; anthers brownish-rose, c. 1 mm long
    Ovary
    Ovary c. 1 mm long; styles of the long-styled flowers c. 3.5 mm long; styles of the short-styled flowers c. 1 mm long
    Fruits
    Nut yellowish-brown, 7 × 4 mm, ovoid, trigonous. Nut yellowish-brown, 7 × 4 mm, ovoid, trigonous.
    Ecology
    Edge of sandy flood plains in Kalahari Sand, after early burning, growing on burnt ground and sandy soils in open situations; c. 1350–1450 m.
    Distribution
    Also in Dem. Rep. Congo. ZAM W Zambia
    Habit
    A perennial herb with a woody rootstock creeping underground. A perennial herb with a woody rootstock creeping underground
    Shoots
    Flowering shoots annual, many, 8–10 cm long, leafless, arising from the rootstock; lateral shoots leafy, arising from the axils of ocreiform cataphylls of the flowering shoots. Flowering shoots annual, many, 8–10 cm long, leafless, arising from the rootstock; lateral shoots leafy, arising from the axils of ocreiform cataphylls of the flowering shoots
    Leaves
    Leaves dark green to yellowish when dry, sessile, 45–50 × 0.75–1 mm, linear-lanceolate to needle-shaped, acute and apiculate at the apex, narrowly cuneate to the base, revolute on the margin. Leaves dark green to yellowish when dry, sessile, 45–50 × 0.75–1 mm, linear-lanceolate to needle-shaped, acute and apiculate at the apex, narrowly cuneate to the base, revolute on the margin
    Male
    Male flowers not seen.
    Hermaphrodite
    Hermaphrodite flowers heterostylous, long-styled flowers not seen; perianth 4–5-lobed; tube c. 4 mm long; lobes white to rose, c. 6 mm long, oblong-lanceolate. Ovary c. 1 mm long; styles of the long-styled flowers c. 3.5 mm long; styles of the short-styled flowers c. 1 mm long. Filaments c. 1–2 mm long, filiform and flattened to the base; anthers brownish-rose, c. 1 mm long.
    Stamens
    Filaments c. 1–2 mm long, filiform and flattened to the base; anthers brownish-rose, c. 1 mm long.
    Pistil
    Ovary c. 1 mm long; styles of the long-styled flowers c. 3.5 mm long; styles of the short-styled flowers c. 1 mm long.

    Images

    Distribution

    Native to:

    Zambia, Zaïre

    Oxygonum tenerum Milne-Redh. appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Aug 29, 2013 Bingham, M.G. [13140], Zambia K000014448
    Milne - Redhead, E. [1115], Zambia K000244063 holotype

    First published in Hooker's Icon. Pl. 33: t. 3216 (1933)

    Accepted by

    • Pope, G.V., Polhill, R.M. & Martins, E.S. (eds.) (2006). Flora Zambesiaca 9(3): 1-277. Royal Botanic Gardens, Kew.

    Literature

    Flora Zambesiaca
    • Kew Bull. 12: 169 (1957).
    • Bull. Jard. Bot. État 24: 4 (1954).
    • Hooker’s Icon. Pl. 33: t. 3216 (1933).
    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

    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