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

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

    [FTEA]

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

    Habit
    A stout, ± glabrous, lush, perennial herb 50 cm. or more tall.
    Stem
    Stems 3–5 mm. thick, reddish-brown. Internodes 4–8 cm.
    Ocrea
    Ocreae pustular, brown, papery, glabrous, readily tearing, truncate, fringed with pubescent setae 4–5 mm. long, the leaf inserted in the upper part.
    Leaves
    Leaves petioled, minutely pustular, 6.5–9 × 2.5–4 cm., ± ovate or ovate-elliptic in outline but strongly and irregularly lobed, apically subacute with a membranous mucro, basally narrowed and decurrent (often unequally) to the petiole, glabrous above and below.
    Petiole
    Petioles brown, 1–2 cm. long.
    Inflorescences
    Inflorescence stout, elongated, 35–40 cm. long, the racemes single or in pairs from the lowest bract.
    Bracts
    Bracts 4–6 mm. long, up to 4 cm. apart, foliaceous and terminally membranous, cup-shaped and rather abruptly widening at the base, truncate but produced dorsally into a lanceolate point ± 2 mm. long, without a terminal fringe of setae.
    Pedicel
    Pedicels exceeding the bracts by 1–2 mm.
    Tepal
    Tepals green outside, cream inside, 4 mm. long, oblong with a short, ± hooded, acute apex.
    Stamens
    Filaments 2 mm. long in long-styled flowers, 4 mm. in short-styled flowers, white, filiform; anthers 0.75–1 mm. long, linear.
    Style
    Long styles 4 mm. long, connate for 2.0 mm.; short styles 1.5 (–2) mm. long.
    Fruits
    Fruit 10 × 6 mm., trigonous, fusiform-conical, broadest towards the base, glabrous, with three short, slightly reflexed prickles 1–1.5 mm. long, spreading from below the middle when immature but distinctly from nearer the base when ripe.
    Figures
    Fig. 6/2–4, p. 35.
    Habitat
    “ Scattered thornbush with poorly developed ground cover ”; also as a weed of native cultivation; 600 m.
    Distribution
    T6 unknown apart from these two records

    Images

    Distribution

    Native to:

    Tanzania

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

    Date Reference Identified As Barcode Type Status
    Feb 25, 1956 Drummond, R.B. [1775], Tanzania K000244052 holotype
    Feb 25, 1956 Drummond, R.B. [1775], Tanzania K000244053 holotype
    Drummond, R.B. [1775], Tanzania 18119.000 holotype

    First published in Kew Bull. 12: 159 (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: 159 (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.
    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