1. Family: Polygonaceae Juss.
    1. Genus: Oxygonum Burch. ex Campd.
      1. Oxygonum litorale R.A.Graham

        This species is accepted, and its native range is Tanzania to N. Zambia.

    [FZ]

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

    Type
    Type:Zambia, Chiengi, Lake Mweru, Bullock 1236 (K, holotype).
    Filaments
    Filaments c. 2 mm long; anthers 0.25–0.35 × 0.20–0.25 mm, ellipsoid
    Ovary
    Ovary 5–7 mm long, fusiform; styles of long-styled flowers 2.25 mm long, connate for 1 mm; styles of short-styled flowers 1.5 mm long, connate for 0.5–0.75 mm
    Fruits
    Nut yellowish-red to brown, 8–10 mm long, fusiform, winged, armed on the angles with prickles; 3 prickles on the angles patent to retrorse and up to 4 mm long, 3 smaller prickles a little below these and in the middle of each face 3 very short prickles. Nut yellowish-red to brown, 8–10 mm long, fusiform, winged, armed on the angles with prickles; 3 prickles on the angles patent to retrorse and up to 4 mm long, 3 smaller prickles a little below these and in the middle of each face 3 very short prickles.
    Ecology
    On sandy banks of rivers, forming long thin lines along a dune contour, and at lakeside; c. 1000 m.
    Note
    Differences between this species and O. ellipticum R.A. Graham, from SW. Tanzania, seem rather inconsistent and the latter could be considered a synonym of O. littorale.
    Distribution
    Also in Tanzania. ZAM N Zambia
    Habit
    A semi-procumbent perennial herb. A semi-procumbent perennial herb
    Stem
    Stems red-brown, up to 30–50 cm tall, branched, longitudinally striate, glabrous. Stems red-brown, up to 30–50 cm tall, branched, longitudinally striate, glabrous
    Leaves
    Leaves slightly fleshy, ± discolorous, dark green above, paler beneath, 2.5–6 × 0.4–1.5 cm, elliptic-lanceolate to ovate-elliptic, apex acute, mucronate, base attenuate into a petiole-like base, margins lobed, midrib prominent beneath, lamina glabrous with pellucid glands. Leaves slightly fleshy, ± discolorous, dark green above, paler beneath, 2.5–6 × 0.4–1.5 cm, elliptic.lanceolate to ovate-elliptic, apex acute, mucronate, base attenuate into a petiole-like base, margins lobed, midrib prominent beneath, lamina glabrous with pellucid glands
    Ocrea
    Ocrea 7–10 mm long, truncate and fringed at the apex with pale brown setae up to 5–8 mm long. Ocrea 7–10 mm long, truncate and fringed at the apex with pale brown setae up to 5–8 mm long
    Flowers
    Flowers shortly pedicellate, 1–4 in the axils of bracts, arranged in terminal and axillary spiciform racemes 10–20(30) cm long; bracts 3–6 mm long, chartaceous, obliquely truncate and produced dorsally into a subulate seta up to 3 mm long and with an apical fringe of 2–3 further setae; pedicels erect, up to 3.5–7 mm long. Male flowers not seen Flowers shortly pedicellate, 1–4 in the axils of bracts, arranged in terminal and axillary spiciform racemes 10–20(30) cm long; bracts 3–6 mm long, chartaceous, obliquely truncate and produced dorsally into a subulate seta up to 3 mm long and with an apical fringe of 2–3 further setae; pedicels erect, up to 3.5–7 mm long Hermaphrodite flowers 4–5 mm long, heterostylous; perianth white or pink, 4–5-lobed; tube 1.5–2 mm long; lobes 2.5 mm long and ovate-lanceolate Hermaphrodite flowers 4–5 mm long, heterostylous; perianth white or pink, 4–5-lobed; tube 1.5–2 mm long; lobes 2.5 mm long and ovate-lanceolate. Male flowers not seen.
    Male
    Male flowers not seen.
    Hermaphrodite
    Hermaphrodite flowers 4–5 mm long, heterostylous; perianth white or pink, 4–5-lobed; tube 1.5–2 mm long; lobes 2.5 mm long and ovate-lanceolate. Ovary 5–7 mm long, fusiform; styles of long-styled flowers 2.25 mm long, connate for 1 mm; styles of short-styled flowers 1.5 mm long, connate for 0.5–0.75 mm. Filaments c. 2 mm long; anthers 0.25–0.35 × 0.20–0.25 mm, ellipsoid.
    Stamens
    Filaments c. 2 mm long; anthers 0.25–0.35 × 0.20–0.25 mm, ellipsoid.
    Pistil
    Ovary 5–7 mm long, fusiform; styles of long-styled flowers 2.25 mm long, connate for 1 mm; styles of short-styled flowers 1.5 mm long, connate for 0.5–0.75 mm.

    Images

    Distribution

    Native to:

    Tanzania, Zambia

    Oxygonum litorale R.A.Graham appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    May 2, 1956 Bullock, A. A. [1236], Zambia K000244064 holotype

    First published in Kew Bull. 12: 153 (1957)

    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: 153, fig. 2/1, 2 (1957). TAB. 8, fig. C.
    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