Oxygonum dregeanum Meisn.

This species is accepted, and its native range is E. Cape Prov. to KwaZulu-Natal.

[FZ]

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

Morphology Stem
Stem erect ascending or sparingly branched or much branched from the base, slightly angular, longitudinally ridged, glabrous to puberulous or retrorsely hispidulous, up to 50 cm or more Stem erect ascending or sparingly branched or much branched from the base, slightly angular, longitudinally ridged, glabrous to puberulous or retrorsely hispidulous, up to 50 cm or more. Stem up to 50 cm tall, ± erect, rarely decumbent
Morphology Leaves
Leaves subsessile, linear to elliptic, lanceolate, ovate or obovate, simple to deeply linear-lobed, sometimes pinnately or bipinnately lobed, each lobe ending in a large slender tip, attenuate at the base into a short petiole Leaves subsessile, linear to elliptic, lanceolate, ovate or obovate, simple to deeply linear-lobed, sometimes pinnately or bipinnately lobed, each lobe ending in a large slender tip, attenuate at the base into a short petiole. Leaves sessile; lamina 15–65(70) × (1)2–20(26) mm, fleshy, linear, lanceolate, entire or with 3–9 lobes or pinnately or bipinnately lobed Leaves deeply divided into 3–9 lobes, with the lower lobes shallowly divided again.
Morphology Leaves Ocrea
Ocrea 4–8 mm long, membranous, lobed, with the lobes ending in slender setae, hairy outside Ocrea 4–8 mm long, membranous, lobed, with the lobes ending in slender setae, hairy outside. Ocrea up to 5 mm long, lobed, ± strigose outside; lobes ending in slender red setae, ± as long as the tubular part
Morphology Reproductive morphology Flowers
Flowers 2–4, pedicellate in the axil of bracts, arranged in terminal and lateral spiciform racemes up to 20 cm long; pedicels up to 7 mm long, articulated near the apex, glabrous or pubescent; bracts 3–4 mm long, cup-shaped, membranous, ± hairy outside Hermaphrodite flowers heterostylous; perianth tubular, 5-lobed; lobes white or pale pink, tinged with pink or wine-red Male flowers present, often solitary; filaments c. 3 mm long Flowers 2–4, pedicellate in the axil of bracts, arranged in terminal and lateral spiciform racemes up to 20 cm long; pedicels up to 7 mm long, articulated near the apex, glabrous or pubescent; bracts 3–4 mm long, cup-shaped, membranous, ± hairy outside. Flowers 1–3 in fascicles in axils of cuspidate bracts, forming a long lax raceme Hermaphrodite flowers heterostylous; perianth tubular, 5-lobed; lobes white or pale pink, tinged with pink or wine-red. Male flowers present, often solitary; filaments c. 3 mm long.
Morphology Reproductive morphology Flowers Androecium Stamens Filaments
Filaments 3–5 mm long, filiform; anthers c. 1 mm long, oblong, reddish-brown or blue
Morphology Reproductive morphology Flowers Gynoecium Ovary
Ovary bluntly trigonous; styles of the long-styled flowers 2.5–5.5 mm long; styles of the short-styled flowers 1–1.5(2) mm long, united for two-thirds of their length
Morphology Reproductive morphology Fruits
Nut 7–12 × 2–4 mm, ovoid-oblong, broadest below the middle, trigonous, longitudinally ridged, wrinkled between the ridges, sometimes with small spines, blunt teeth or wings on the angles near the base, glabrous to puberulous. Nut 7–12 × 2–4 mm, ovoid-oblong, broadest below the middle, trigonous, longitudinally ridged, wrinkled between the ridges, sometimes with small spines, blunt teeth or wings on the angles near the base, glabrous to puberulous. Nut 10 × 5 mm, ovoid, sometimes with a spine one-third of the way from the base, slightly puberulous.
Note
This complex is very variable, varying in habit, size, shape and divisions of leaf, fringes of the ocrea, size and colour of flowers, degree of polygamy, shape of fruit, etc. We follow the treatment given by Germishuizen in Bothalia 18: 173–181 (1988). Subsp. dregeanum is restricted to the coast and midlands of KwaZulu-Natal and adjacent parts of the Eastern Cape Province (Transkei).
Morphology General Habit
Perennial ± erect herb; leaves 25–40 × 2–5 mm, linear to narrowly elliptic, entire on the margins, rarely with very rudimentary lobes near the base; inflorescence a long slender terminal or axillary raceme Short or long and robust perennial herb, arising from a woody rootstock. Perennial herb much branched from a thick vertical woody stock Short or long and robust perennial herb, arising from a woody rootstock
Ecology
Banks of water courses, grasslands, sandy and dry soils; c. 1100–1400 m.
Distribution
BOT N, ZIM W, ZIM C, ZIM E, ZIM S Botswana Also in South Africa (Northern Cape, North-West, Limpopo, Gauteng, Mpumalanga and Free State Provinces). Zimbabwe
sex Male
Male flowers present, often solitary; filaments c. 3 mm long.
sex Hermaphrodite
Hermaphrodite flowers heterostylous; perianth tubular, 5-lobed; lobes white or pale pink, tinged with pink or wine-red. Filaments 3–5 mm long, filiform; anthers c. 1 mm long, oblong, reddish-brown or blue. Ovary bluntly trigonous; styles of the long-styled flowers 2.5–5.5 mm long; styles of the short-styled flowers 1–1.5(2) mm long, united for two-thirds of their length.
Morphology Reproductive morphology Flowers Androecium Stamens
Filaments 3–5 mm long, filiform; anthers c. 1 mm long, oblong, reddish-brown or blue.
Morphology Reproductive morphology Flowers Gynoecium Pistil
Ovary bluntly trigonous; styles of the long-styled flowers 2.5–5.5 mm long; styles of the short-styled flowers 1–1.5(2) mm long, united for two-thirds of their length.

Native to:

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

Oxygonum dregeanum Meisn. appears in other Kew resources:

First published in Linnaea 14: 487 (1841)

Accepted by

  • 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 18: 173 (1988).
  • Burtt Davy, Fl. Pl. Ferns Transvaal, part 1: 167 (1926).
  • F.C. 5, 1: 461 (1912).
  • Kew Bull. 12: 166 (1957).
  • Linnaea 14: 487 (1840).
  • Prodr. Fl. SW. Afrika, fam. 23: 4 (1969).

Kew Backbone Distributions

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

  • 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