- Family:
- Polygonaceae Juss.
- Genus:
- Oxygonum Burch. ex Campd.
Oxygonum delagoense Kuntze
[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).
- Morphology General 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.
- Morphology 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.
- Morphology 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.
- Morphology Leaves 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.
- Morphology Reproductive morphology 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.
- Morphology Reproductive morphology Flowers Androecium Stamens Filaments
- Filaments 1–4.5 mm long, filiform; anthers 0.4–0.5 × 0.25 mm
- Morphology Reproductive morphology Flowers Gynoecium 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
- Morphology Reproductive morphology 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
- sex Male
- Male flowers present; perianth c. 5 mm long; lobes 2–2.5 mm long; filaments 2.5–3 mm long.
- Morphology Reproductive morphology Flowers Androecium Stamens
- Filaments 1–4.5 mm long, filiform; anthers 0.4–0.5 × 0.25 mm.
- Morphology Reproductive morphology Flowers Gynoecium 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.
- sex 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
- Morphology General Habit
- An erect or ascending herb.
- Morphology Stem
- Stems up to 1 m. tall, glabrous to pubescent, reddish-brown.
- Morphology Leaves Ocrea
- Ocreae 4–6 mm. long, pubescent, membranous, truncate, with a terminal fringe of ± light-brown, erect-patent setae 4–5 mm. long.
- Morphology 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.
- Morphology Reproductive morphology Inflorescences
- Inflorescence elongated, probably up to 30 cm.
- Morphology Reproductive morphology Inflorescences Bracts
- Bracts 4 mm. long, 1–2.5 (–3) cm. apart, pubescent, with or (commonly) without a fringe of setae.
- Morphology Reproductive morphology Flowers Pedicel
- Pedicels 2–4 (–6) together, not exceeding the bracts by more than 3 mm., erect, glabrous or puberulous.
- Morphology Reproductive morphology Flowers
- Flowers white, 4.75–6 mm. long.
- Morphology Reproductive morphology Flowers Tepal
- Tepals 3–3.75 mm. long.
- Morphology Reproductive morphology Flowers Gynoecium Style
- Short styles probably 1.5–2.5 mm. long, free to the base or up to 1 mm. connate.
- Morphology Reproductive morphology Flowers Androecium Stamens Filaments
- Filaments 1–4.5 mm. long.
- Morphology Reproductive morphology 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 | Has image? |
---|---|---|---|---|---|
Aug 29, 2013 | Bingham, M.G. [13151], Zambia | K000014446 | No | ||
Sep 1, 2005 | Hochobes, M.M. [MH1233], Namibia | K000449604 | No | ||
Sep 1, 2005 | Hochobes, M.M. [MH1212], Namibia | K000449603 | No | ||
Jan 1, 1987 | Scott Elliot, G.F. [8365], Tanzania | K000244025 | holotype | No | |
Kuntze, O. [s.n.], Mozambique | K000244024 | isotype | No |
First published in Revis. Gen. Pl. 3(2): 268 (1898)
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.
- Graham, R.A. (1958). Flora of Tropical East Africa, Polygonaceae: 1-40.
- Pope, G.V., Polhill, R.M. & Martins, E.S. (eds.) (2006). Flora Zambesiaca 9(3): 1-277. Royal Botanic Gardens, Kew.
- 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.
Literature
Flora Zambesiaca
- F.C. 5, 1: 461 (1912).
- F.T.A. 6, 1: 100 (1909).
- F.T.E.A., Polygonaceae: 30 (1958).
- Kew Bull. 12: 164 (1957)
- Prodr. Fl. SW. Afrika, fam. 23: 4 (1969).
- 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.
- 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.
Flora of Tropical East Africa
- Baker & C.H. Wright in Flora of Tropical Africa 6 (1): 100 (1909).
- C. H. Wright in Fl. Cap. 5 (1): 461 (1912).
- Kuntze, Rev. Gen. Pl. 3: 268 (1898).
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Flora Zambesiaca
Flora Zambesiaca
http://creativecommons.org/licenses/by-nc-sa/3.0
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Flora of Tropical East Africa
Flora of Tropical East Africa
http://creativecommons.org/licenses/by-nc-sa/3.0
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Herbarium Catalogue Specimens
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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
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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