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This species is accepted, and its native range is Tanzania to S. Africa.

[FZ]

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

Type
Type:Mozambique, Delagoa Bay, Kuntze s.n. (NY, holotype; K).
Habit
An erect or ascending, annual or short-lived perennial herb with a taproot, generally branching from the base An erect or ascending, annual or short-lived perennial herb with a taproot, generally branching from the base.
Stem
Stems reddish-brown, up to 1 m tall, branched, longitudinally striate, glabrous to pubescent; branches slender, papillose Stems reddish-brown, up to 1 m tall, branched, longitudinally striate, glabrous to pubescent; branches slender, papillose.
Leaves
Leaves 2–8 × 0.3–1.8 cm, narrowly elliptic.lanceolate or linear-lanceolate to lanceolate, acute and mucronate at the apex, attenuate or decurrent at the base, ± sinuous or with 1–3 pairs of forward-directed lobes on the margins, sometimes very asymmetrical; midrib prominent beneath and ± puberulous or glabrous Leaves 2–8 × 0.3–1.8 cm, narrowly elliptic-lanceolate or linear-lanceolate to lanceolate, acute and mucronate at the apex, attenuate or decurrent at the base, ± sinuous or with 1–3 pairs of forward-directed lobes on the margins, sometimes very asymmetrical; midrib prominent beneath and ± puberulous or glabrous.
Ocrea
Ocrea 4–6 mm long, truncate with a fringe of light brown setae 4–5 mm long at the apex Ocrea 4–6 mm long, truncate with a fringe of light brown setae 4–5 mm long at the apex.
Flowers
Flowers pedicellate, 2–4(6) in the axils of bracts, arranged in lax terminal slender racemes up to 30 cm long; bracts up to 4 mm long, chartaceous, obliquely truncate, without a fringe of setae or sometimes with a fringe of setae up to 3 mm long; pedicels 5–7 mm long, erect, glabrous or puberulous Hermaphrodite flowers heterostylous; perianth white, greenish or pale pink, lobed; tube 1.75–2.3 mm long and densely pubescent outside; lobes 3–4 mm long, oblong, ± acute Male flowers present; perianth c. 5 mm long; lobes 2–2.5 mm long; filaments 2.5–3 mm long Flowers pedicellate, 2–4(6) in the axils of bracts, arranged in lax terminal slender racemes up to 30 cm long; bracts up to 4 mm long, chartaceous, obliquely truncate, without a fringe of setae or sometimes with a fringe of setae up to 3 mm long; pedicels 5–7 mm long, erect, glabrous or puberulous. Hermaphrodite flowers heterostylous; perianth white, greenish or pale pink, lobed; tube 1.75–2.3 mm long and densely pubescent outside; lobes 3–4 mm long, oblong, ± acute. Male flowers present; perianth c. 5 mm long; lobes 2–2.5 mm long; filaments 2.5–3 mm long.
Filaments
Filaments 1–4.5 mm long, filiform; anthers 0.4–0.5 × 0.25 mm
Ovary
Ovary 1 × 0.5 mm; styles of the long-styled flowers 3–3.5 mm long; styles of the short-styled flowers 1–3.5 mm long
Fruits
Nut 5–6 mm long, triquetrous, ± conical, usually armed a little above the base with 3 small, sometimes minute, ± retrorse teeth or protuberances at the angles. Nut 5–6 mm long, triquetrous, ± conical, usually armed a little above the base with 3 small, sometimes minute, ± retrorse teeth or protuberances at the angles.
Ecology
In open grassland and in sandy soils at water edges; 20–1200 m.
Distribution
Zimbabwe BOT N, BOT W, BOT SE, ZIM W, ZIM C, ZIM S, MOZ N Botswana MOZ M Also in Tanzania, Angola, Namibia and South Africa. MOZ GI Mozambique
Male
Male flowers present; perianth c. 5 mm long; lobes 2–2.5 mm long; filaments 2.5–3 mm long.
Stamens
Filaments 1–4.5 mm long, filiform; anthers 0.4–0.5 × 0.25 mm.
Pistil
Ovary 1 × 0.5 mm; styles of the long-styled flowers 3–3.5 mm long; styles of the short-styled flowers 1–3.5 mm long.
Hermaphrodite
Ovary 1 × 0.5 mm; styles of the long-styled flowers 3–3.5 mm long; styles of the short-styled flowers 1–3.5 mm long. Filaments 1–4.5 mm long, filiform; anthers 0.4–0.5 × 0.25 mm. Hermaphrodite flowers heterostylous; perianth white, greenish or pale pink, lobed; tube 1.75–2.3 mm long and densely pubescent outside; lobes 3–4 mm long, oblong, ± acute.

[FTEA]

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

Habit
An erect or ascending herb.
Stem
Stems up to 1 m. tall, glabrous to pubescent, reddish-brown.
Ocrea
Ocreae 4–6 mm. long, pubescent, membranous, truncate, with a terminal fringe of ± light-brown, erect-patent setae 4–5 mm. long.
Leaves
Leaves 2–8 cm. long, often less than 8 mm. broad but up to 1.8 cm., basally decurrent, narrowly elliptic-lanceolate or linear-lanceolate to lanceolate or lanceolate-elliptic, apically acute, mucronate, entire, the margins sinuous, or with 1–3 pairs of forward-directed lobes, sometimes very asymmetrical, puberulent or not on the midrib.
Inflorescences
Inflorescence elongated, probably up to 30 cm.
Bracts
Bracts 4 mm. long, 1–2.5 (–3) cm. apart, pubescent, with or (commonly) without a fringe of setae.
Pedicel
Pedicels 2–4 (–6) together, not exceeding the bracts by more than 3 mm., erect, glabrous or puberulous.
Flowers
Flowers white, 4.75–6 mm. long.
Tepal
Tepals 3–3.75 mm. long.
Style
Short styles probably 1.5–2.5 mm. long, free to the base or up to 1 mm. connate.
Filaments
Filaments 1–4.5 mm. long.
Fruits
Fruit 5 (–6) mm. long, pubescent, otherwise smooth, conical, usually armed a little above the base with three small (sometimes scarcely perceptible) ± retrorse teeth or protuberances at the angles.
Habitat
Roadsides, disturbed and weedy ground, and in crops (maize)
Distribution
T6 also elsewhere in southern and particularly in coastal SE. Africa

Native to:

Angola, Botswana, Cape Provinces, KwaZulu-Natal, Mozambique, Namibia, Northern Provinces, Swaziland, Tanzania, Zambia, Zimbabwe

Oxygonum delagoense Kuntze appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Aug 29, 2013 Bingham, M.G. [13151], Zambia K000014446
Sep 1, 2005 Hochobes, M.M. [MH1212], Namibia K000449603
Sep 1, 2005 Hochobes, M.M. [MH1233], Namibia K000449604
Jan 1, 1987 Scott Elliot, G.F. [8365], Tanzania K000244025 holotype
Kuntze, O. [s.n.], Mozambique K000244024 isotype

First published in Revis. Gen. Pl. 3(2): 268 (1898)

Accepted by

  • Schuster, T.M., Reveal, J.L., Bayly, M.J. & Kron, K.A. (2015). An updated molecular phylogeny of Polygonoideae (Polygonaceae): relationships of Oxygonum, Pteroxygonum, and Rumex, and a new circumscription of Koenigia Taxon 64: 1188-1208.
  • 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.
  • Germishuizen, G. & Meyer, N.L. (eds.) (2003). Plants of Southern Africa an annotated checklist Strelitzia 14: 1-1231. National Botanical Institute, Pretoria.
  • Graham, R.A. (1958). Flora of Tropical East Africa, Polygonaceae: 1-40.

Literature

Flora Zambesiaca

  • Prodr. Fl. SW. Afrika, fam. 23: 4 (1969).
  • F.T.E.A., Polygonaceae: 30 (1958).
  • Kew Bull. 12: 164 (1957)
  • F.C. 5, 1: 461 (1912).
  • F.T.A. 6, 1: 100 (1909).
  • Revis. Gen. Pl. 3, 3: 268 (1898).

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.
  • Germishuizen, G. & Meyer, N.L. (eds.) (2003). Plants of Southern Africa an annotated checklist Strelitzia 14: 1-1231. National Botanical Institute, Pretoria.

Flora of Tropical East Africa

  • C. H. Wright in Fl. Cap. 5 (1): 461 (1912).
  • Baker & C.H. Wright in Flora of Tropical Africa 6 (1): 100 (1909).
  • Kuntze, Rev. Gen. Pl. 3: 268 (1898).

Flora Zambesiaca
Flora Zambesiaca
http://creativecommons.org/licenses/by-nc-sa/3.0

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 2021. 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 2021. 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