- Family:
- Polygonaceae Juss.
- Genus:
- Oxygonum Burch. ex Campd.
Oxygonum salicifolium Dammer
[FTEA]
Polygonaceae, R. A. Graham. Flora of Tropical East Africa. 1958
- Morphology General Habit
- A creeping herb, with ascending or prostrate branches.
- Morphology Stem
- Creeping stems woody, reddish-brown, subglabrous to pilose; shoots up to 35 cm. long, pubescent.
- Morphology Leaves Ocrea
- Ocreae 0.4–1 cm. long, membranous, thinly or thickly covered with whitish hairs, terminally truncate and fringed with red setae 6–9 mm. long, the leaf inserted usually in the centre or slightly below.
- Morphology Leaves
- Leaves sessile, narrowly linear-lanceolate, broadest towards the base, (30–) 50–60 (–70) × (2) 38 (–10) mm., not or only slightly sinuous on the margin, apically acute, often mucronate, basally narrowed, the midrib prominent below, whitish, almost glabrous on both faces, or pilose mainly on the margins and midrib.
- Morphology Reproductive morphology Inflorescences
- Inflorescence slender, 12–20 cm. long.
- Morphology Reproductive morphology Inflorescences Bracts
- Bracts 3–3.5 mm. long, glandular, usually glabrous, truncate but produced dorsally to an acute setose apex, with a terminal fringe of 3–5 setae which may exceed the length of the bract.
- Morphology Reproductive morphology Flowers Tepal
- Tepals 4 mm. long (6 mm. fide Dammer); linear-lanceolate, the tube very short.
- Morphology Reproductive morphology Flowers Androecium Stamens Filaments
- Filaments 3.5–4 mm..
- Morphology Reproductive morphology Flowers Gynoecium Style
- Short-styled flowers with styles 1 mm. long, free almost to the base; long-styled flowers with styles ± 4 mm. long, exserted.
- Morphology Reproductive morphology Fruits
- Fruit pubescent, 10 mm. long, with three prickles 3–3.5 mm. long, spreading horizontally (or slightly ascending) from the centre or from up to 1 mm. above it.
- Figures
- Fig. 5/5 and 6, p. 29.
- Habitat
- Grasslands and disturbed ground; 0–1560 m.
- Distribution
- K4 K7 T1 T3 T5 T7 not known elsewhere
[FZ]
Flora Zambesiaca. Vol. 9, Part 3. Polygonaceae-Myriaceae. Pope GV, Polhill RM, Martins ES. 2006.
- Type
- Type from Tanzania.
- Morphology General Habit
- A creeping perennial plant with ascending or prostrate branches A creeping perennial plant with ascending or prostrate branches.
- Morphology Stem
- Stems reddish-brown, woody, pubescent or subglabrous; shoots up to 35 cm long, pubescent Stems reddish-brown, woody, pubescent or subglabrous; shoots up to 35 cm long, pubescent.
- Morphology Leaves
- Leaves sessile, (30)50–60(70) × (2)3–8(10) mm, elliptic to linear-lanceolate, acute at the apex, often mucronate, narrowed and cuneate towards the base, the midrib prominent below, not or slightly sinuous on the margin, whitish and almost glabrous on both surfaces, or ± pubescent on the margins and midrib Leaves sessile, (30)50–60(70) × (2)3–8(10) mm, elliptic to linear-lanceolate, acute at the apex, often mucronate, narrowed and cuneate towards the base, the midrib prominent below, not or slightly sinuous on the margin, whitish and almost glabrous on both surfaces, or ± pubescent on the margins and midrib.
- Morphology Leaves Ocrea
- Ocrea 0.4–1 cm long, truncate and fringed with red setae 6–9 mm long at the apex, thinly or thickly covered with whitish hairs Ocrea 0.4–1 cm long, truncate and fringed with red setae 6–9 mm long at the apex, thinly or thickly covered with whitish hairs.
- Morphology Reproductive morphology Flowers
- Hermaphrodite flowers heterostylous; perianth tubular, 4–5-lobed, tube c. 2 mm long, lobes 2–2.5 mm long and oblong-lanceolate to linear-lanceolate, pubescent outside, glabrous inside Flowers pedicellate, 1–3 in the axils of chartaceous bracts arranged in terminal slender spiciform racemes 12–20 cm long; bracts 3–4 mm long, ± pubescent, truncate but produced dorsally into an acute setose apex, with a terminal fringe of 3–5 setae which may exceed the bract in length; bracteoles 2, hyaline, c. 2 mm long with 1–2 short setae at the apex; pedicels up to 4 mm long. Male flowers not seen Flowers pedicellate, 1–3 in the axils of chartaceous bracts arranged in terminal slender spiciform racemes 12–20 cm long; bracts 3–4 mm long, ± pubescent, truncate but produced dorsally into an acute setose apex, with a terminal fringe of 3–5 setae which may exceed the bract in length; bracteoles 2, hyaline, c. 2 mm long with 1–2 short setae at the apex; pedicels up to 4 mm long Hermaphrodite flowers heterostylous; perianth tubular, 4–5-lobed, tube c. 2 mm long, lobes 2–2.5 mm long and oblong-lanceolate to linear-lanceolate, pubescent outside, glabrous inside. Male flowers not seen.
- Morphology Reproductive morphology Flowers Androecium Stamens Filaments
- Filaments 2.5(4) mm long, filiform; anthers 0.5–0.55 × 0.35–0.4 mm, oblong
- Morphology Reproductive morphology Flowers Gynoecium Ovary
- Ovary 2–2.5 mm long, ellipsoid; styles of long-styled flowers c. 4 mm long; styles of short-styled flowers shorter than the stamens, c. 1.5 mm long
- Ecology
- Grasslands and disturbed ground; c. 950 m.
- Distribution
- ZAM S Zambia Also in Kenya, Tanzania and Angola.
- sex Male
- Male flowers not seen.
- Morphology Reproductive morphology Flowers Androecium Stamens
- Filaments 2.5(4) mm long, filiform; anthers 0.5–0.55 × 0.35–0.4 mm, oblong.
- Morphology Reproductive morphology Flowers Gynoecium Pistil
- Ovary 2–2.5 mm long, ellipsoid; styles of long-styled flowers c. 4 mm long; styles of short-styled flowers shorter than the stamens, c. 1.5 mm long.
- sex Hermaphrodite
- Ovary 2–2.5 mm long, ellipsoid; styles of long-styled flowers c. 4 mm long; styles of short-styled flowers shorter than the stamens, c. 1.5 mm long. Filaments 2.5(4) mm long, filiform; anthers 0.5–0.55 × 0.35–0.4 mm, oblong. Hermaphrodite flowers heterostylous; perianth tubular, 4–5-lobed, tube c. 2 mm long, lobes 2–2.5 mm long and oblong-lanceolate to linear-lanceolate, pubescent outside, glabrous inside.
- Morphology Reproductive morphology Fruits
- Nut c. 10 mm long, with 3 prickles 3–3.5 mm long, spreading horizontally or somewhat ascending from the middle, or from up to 1 mm above the middle. Nut c. 10 mm long, with 3 prickles 3–3.5 mm long, spreading horizontally or somewhat ascending from the middle, or from up to 1 mm above the middle.
Native to:
Angola, Kenya, Tanzania, Zambia
Oxygonum salicifolium Dammer appears in other Kew resources:
Date | Reference | Identified As | Barcode | Type Status | Has image? |
---|---|---|---|---|---|
Jul 1, 1893 | Holst, C. [3186], Tanzania | K000244057 | lectotype | No |
First published in Abh. Königl. Akad. Wiss. Berlin 1894: 41 (1894)
Accepted by
- Figueiredo, E. & Smith, G.F. (2008). Plants of Angola. Strelitzia 22: 1-279. 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.
Literature
Flora Zambesiaca
- Engler, Pflanzenw. Ost-Afrikas C: 171 (1895).
- F.T.A. 6, 1: 102 (1909).
- F.T.E.A., Polygonaceae: 31 (1958).
- Kew Bull. 12: 163 (1957)
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 of Tropical East Africa
- Baker & C.H. Wright in Flora of Tropical Africa 6 (1): 102 (1909).
- Dammer in Die Pflanzenwelt Ost-Afrikas und der Nachbargebiete, Theile C: 171 (1895).
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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