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

Morphology General Habit
A stout, ± glabrous, lush, perennial herb 50 cm. or more tall.
Morphology Stem
Stems 3–5 mm. thick, reddish-brown. Internodes 4–8 cm.
Morphology Leaves Ocrea
Ocreae pustular, brown, papery, glabrous, readily tearing, truncate, fringed with pubescent setae 4–5 mm. long, the leaf inserted in the upper part.
Morphology 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.
Morphology Leaves Petiole
Petioles brown, 1–2 cm. long.
Morphology Reproductive morphology Inflorescences
Inflorescence stout, elongated, 35–40 cm. long, the racemes single or in pairs from the lowest bract.
Morphology Reproductive morphology Inflorescences 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.
Morphology Reproductive morphology Flowers Pedicel
Pedicels exceeding the bracts by 1–2 mm.
Morphology Reproductive morphology Flowers Tepal
Tepals green outside, cream inside, 4 mm. long, oblong with a short, ± hooded, acute apex.
Morphology Reproductive morphology Flowers Androecium Stamens
Filaments 2 mm. long in long-styled flowers, 4 mm. in short-styled flowers, white, filiform; anthers 0.75–1 mm. long, linear.
Morphology Reproductive morphology Flowers Gynoecium Style
Long styles 4 mm. long, connate for 2.0 mm.; short styles 1.5 (–2) mm. long.
Morphology Reproductive morphology 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

Native to:

Tanzania

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

Date Reference Identified As Barcode Type Status Has image?
Feb 25, 1956 Drummond, R.B. [1775], Tanzania K000244052 holotype No
Feb 25, 1956 Drummond, R.B. [1775], Tanzania K000244053 holotype Yes
Drummond, R.B. [1775], Tanzania 18119.000 holotype No

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).

  • Flora of Tropical East Africa

    Flora of Tropical East Africa
    http://creativecommons.org/licenses/by-nc-sa/3.0

  • Herbarium Catalogue Specimens

    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 2022. 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 2022. 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