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

        This species is accepted, and its native range is W. Tanzania.

    [FTEA]

    Polygonaceae, R. A. Graham. Flora of Tropical East Africa. 1958

    Habit
    A slender, semi-prostrate, spreading herb.
    Stem
    Stems green becoming brown, puberulous, with long internodes 6–9 cm. apart.
    Ocrea
    Ocreae 0.8–1.1 cm. long, appressed when young, becoming more open with age, puberulous, truncate, with a terminal fringe of setae 4–4.25 mm. long, the leaf inserted in the upper half but often near the middle.
    Leaves
    Leaves petiolate, elliptic-lanceolate to ovate-elliptic, 5–5.5 × 1.5–2 cm., broadest at or a little below the middle, apically acuminate with a short terminal mucro, gradually narrowed and decurrent to the petiole, puberulous on the veins of both sides.
    Petiole
    Petioles 1–1.5 cm. long.
    Inflorescences
    Inflorescence slender, up to 30 cm. long.
    Bracts
    Bracts 4–5 mm. long, 1–5 cm. apart, truncate but produced dorsally into a seta 3–4 mm. long, with 1–2 pairs of shorter, lateral setae.
    Pedicel
    Pedicels glabrous or minutely puberulous, exceeding the bracts by 3–4 mm.
    Flowers
    Flowers 1–4 to each bract.
    Tepal
    Tepals 4–5 mm. long, linear-oblong to obovate.
    Style
    Styles yellow, 5 mm. long, connate for 2 mm. (only long styles seen).
    Fruits
    Fruit fusiform, glabrous or with scattered papillae, 7–8 mm. long and almost as wide, with three central spreading prickles 2 mm. long on the angles, with or without intermediate, smaller prickles on the faces, the angles also sometimes winged and in the lower half sometimes with 1–2 small teeth on the angles which may not project beyond the wing.
    Figures
    Fig. 6/6 and 7.
    Habitat
    Sandy littoral of the lake; 1050 m.
    Distribution
    not certainly recorded elsewhere T4

    Distribution

    Native to:

    Tanzania

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

    Date Reference Identified As Barcode Type Status
    Bullock, A. A. [2333], Tanzania K000244048 holotype

    First published in Kew Bull. 12: 156 (1957)

    Accepted by

    • Graham, R.A. (1958). Flora of Tropical East Africa, Polygonaceae: 1-40.

    Literature

    Kew Backbone Distributions
    • Graham, R.A. (1958). Flora of Tropical East Africa, Polygonaceae: 1-40.
    Flora of Tropical East Africa
    • R. Grah. in Kew Bulletin 1957: 156 (1957).

    Sources

    Flora of Tropical East Africa
    Flora of Tropical East Africa
    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.

    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