Oxygonum alatum Burch.

This species is accepted, and its native range is Angola to S. Arrica.

[FZ]

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

Type
Type from South Africa (Northern Cape Province).
Morphology General Habit
A spreading prostrate semi-erect or erect, fleshy annual herb A spreading prostrate semi-erect or erect, fleshy annual herb.
Morphology Stem
Stems pinkish to reddish-purple, up to 50 cm tall, much branched from the base, longitudinally ridged, sparsely to densely covered with white cup-shaped and/or elongated scales Stems pinkish to reddish-purple, up to 50 cm tall, much branched from the base, longitudinally ridged, sparsely to densely covered with white cup-shaped and/or elongated scales.
Morphology Leaves
Leaves fleshy, (14)17–85(125) × (2)4–25 mm, ovate to lanceolate sometimes rhomboid, acute at the apex, attenuate below into a short petiole, entire or shallowly to deeply lobed, the lobes usually further divided, midrib prominent on the undersurface Leaves fleshy, (14)17–85(125) × (2)4–25 mm, ovate to lanceolate sometimes rhomboid, acute at the apex, attenuate below into a short petiole, entire or shallowly to deeply lobed, the lobes usually further divided, midrib prominent on the undersurface.
Morphology Leaves Ocrea
Ocrea greenish-white, membranous, up to 1 cm long, funnel-shaped, glabrescent or covered with cup-shaped and/or elongated scales, truncate and fringed at the apex with red or white rigid setae 2–3.5 mm long, lobed or sometimes entire Ocrea greenish-white, membranous, up to 1 cm long, funnel-shaped, glabrescent or covered with cup-shaped and/or elongated scales, truncate and fringed at the apex with red or white rigid setae 2–3.5 mm long, lobed or sometimes entire.
Morphology Reproductive morphology Flowers
Male flowers present; perianth 4–5 mm long; lobes 1–2 mm long; filaments 3–3.5 mm long Flowers pedicellate, 2–4 in the axils of bracts, arranged in lax terminal and axillary spiciform racemes 10–25(30) cm long; bracts membranous, 4–5 mm long, obliquely truncate and produced dorsally into a subulate seta 1–2 mm long; pedicels up to 7 mm long, pubescent or with cup-shaped and/or elongated scales Hermaphrodite flowers heterostylous; perianth pink or white, 5-lobed; tube c. 5 mm long; lobes 5–7 mm long and ovate-lanceolate Flowers pedicellate, 2–4 in the axils of bracts, arranged in lax terminal and axillary spiciform racemes 10–25(30) cm long; bracts membranous, 4–5 mm long, obliquely truncate and produced dorsally into a subulate seta 1–2 mm long; pedicels up to 7 mm long, pubescent or with cup-shaped and/or elongated scales. Male flowers present; perianth 4–5 mm long; lobes 1–2 mm long; filaments 3–3.5 mm long. Hermaphrodite flowers heterostylous; perianth pink or white, 5-lobed; tube c. 5 mm long; lobes 5–7 mm long and ovate-lanceolate.
Morphology Reproductive morphology Flowers Androecium Stamens Filaments
Filaments 1.5–4 mm long, with a ring of cilia near the base; anthers grey-blue to blackish, 0.5–1 × 0.3–0.5 mm
Morphology Reproductive morphology Flowers Gynoecium Ovary
Ovary 5–7 × 1–1.5 mm; styles of the long-styled flowers 3–3.5 mm long; styles of the short-styled flowers 1–3.5 mm long
Morphology Reproductive morphology Fruits
Nut red or yellow-brown, (9)10–13 × 9–11 mm, trigonous, winged or not at the angles, sometimes with small spreading prickles in the lower one third, glabrous or with a few scattered cup-shaped and/or elongated scales. Nut red or yellow-brown, (9)10–13 × 9–11 mm, trigonous, winged or not at the angles, sometimes with small spreading prickles in the lower one third, glabrous or with a few scattered cup-shaped and/or elongated scales.
Note
Cup shaped scales found on all parts of the plant, elongated scales absent.
Ecology
In low rainfall areas, in gravel, stony or sandy soils and in disturbed places such as roadsides; 900–1250 m.
Distribution
Also in southern Angola, Namibia and South Africa (North-West Province and Northern Cape Province).
sex Male
Male flowers present; perianth 4–5 mm long; lobes 1–2 mm long; filaments 3–3.5 mm long.
Morphology Reproductive morphology Flowers Androecium Stamens
Filaments 1.5–4 mm long, with a ring of cilia near the base; anthers grey-blue to blackish, 0.5–1 × 0.3–0.5 mm.
Morphology Reproductive morphology Flowers Gynoecium Pistil
Ovary 5–7 × 1–1.5 mm; styles of the long-styled flowers 3–3.5 mm long; styles of the short-styled flowers 1–3.5 mm long.
sex Hermaphrodite
Ovary 5–7 × 1–1.5 mm; styles of the long-styled flowers 3–3.5 mm long; styles of the short-styled flowers 1–3.5 mm long. Filaments 1.5–4 mm long, with a ring of cilia near the base; anthers grey-blue to blackish, 0.5–1 × 0.3–0.5 mm. Hermaphrodite flowers heterostylous; perianth pink or white, 5-lobed; tube c. 5 mm long; lobes 5–7 mm long and ovate-lanceolate.

Native to:

Angola, Botswana, Cape Provinces, Caprivi Strip, Mozambique, Namibia, Northern Provinces, Zambia, Zimbabwe

Oxygonum alatum Burch. appears in other Kew resources:

First published in Trav. S. Africa 1: 548 (1822)

Accepted by

  • Figueiredo, E. & Smith, G.F. (2008). Plants of Angola Strelitzia 22: 1-279. National Botanical Institute, Pretoria.
  • Germishuizen, G. & Meyer, N.L. (eds.) (2003). Plants of Southern Africa an annotated checklist Strelitzia 14: 1-1231. National Botanical Institute, Pretoria.
  • Pope, G.V., Polhill, R.M. & Martins, E.S. (eds.) (2006). Flora Zambesiaca 9(3): 1-277. Royal Botanic Gardens, Kew.

Literature

Flora Zambesiaca

  • Bothalia 17: 185 (1987).
  • Burtt Davy, Fl. Pl. Ferns Transvaal, part 1: 167 (1926).
  • F.C. 5, 1: 460 (1912).
  • F.T.A. 6, 1: 99 (1909).
  • Hiern, Cat. Afr. Pl. Welw. 1, 4: 902 (1900).
  • Kew Bull. 12: 165 (1957).
  • M. Phillips, Guide Arable Weeds Botswana: 92, photo. (1991).
  • Prodr. Fl. SW. Afrika, fam. 23: 3 (1969).
  • Trans. Roy. Soc. South Africa 5: 346 (1916).
  • Trav. South. Africa 1: 548 (1822).

Kew Backbone Distributions

  • Figueiredo, E. & Smith, G.F. (2008). Plants of Angola Strelitzia 22: 1-279. National Botanical Institute, Pretoria.
  • Pope, G.V., Polhill, R.M. & Martins, E.S. (eds.) (2006). Flora Zambesiaca 9(3): 1-277. Royal Botanic Gardens, Kew.

  • Flora Zambesiaca

    Flora Zambesiaca
    http://creativecommons.org/licenses/by-nc-sa/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

  • Plants and People Africa

    Common Names from Plants and People Africa http://www.plantsandpeopleafrica.com/
    © Plants and People Africa http://www.plantsandpeopleafrica.com http://creativecommons.org/licenses/by/3.0/