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

Morphology General Habit
A slender, semi-prostrate, spreading herb.
Morphology Stem
Stems green becoming brown, puberulous, with long internodes 6–9 cm. apart.
Morphology Leaves 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.
Morphology 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.
Morphology Leaves Petiole
Petioles 1–1.5 cm. long.
Morphology Reproductive morphology Inflorescences
Inflorescence slender, up to 30 cm. long.
Morphology Reproductive morphology Inflorescences 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.
Morphology Reproductive morphology Flowers Pedicel
Pedicels glabrous or minutely puberulous, exceeding the bracts by 3–4 mm.
Morphology Reproductive morphology Flowers
Flowers 1–4 to each bract.
Morphology Reproductive morphology Flowers Tepal
Tepals 4–5 mm. long, linear-oblong to obovate.
Morphology Reproductive morphology Flowers Gynoecium Style
Styles yellow, 5 mm. long, connate for 2 mm. (only long styles seen).
Morphology Reproductive morphology 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

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).

  • Flora of Tropical East Africa

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

  • Herbarium Catalogue Specimens

  • 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