Persicaria amphibia (L.) Delarbre

First published in Fl. Auvergne, ed. 2: 519 (1800)
This species is accepted
The native range of this species is Subarctic & Temp. Northern Hemisphere, Ethiopia to Kenya, S. Africa. It is a perennial or helophyte and grows primarily in the temperate biome.

Descriptions

IUCN Red List of Threatened Species https://www.iucnredlist.org/species/184425/13566131

Conservation
LC - least concern
[IUCN]

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

Morphology General Habit
A variable perennial, with two distinct growth forms depending upon habitat - (i) Floating on water (ii) Terrestrial or growing on dry mud
Morphology Stem
Floating form:Stems weak, glabrous, green to greenish-brown, trailing, rooting at the nodes in the water. Terrestrial form:Stems erect, rooting only at the lower nodes.
Morphology Leaves
Terrestrial Form:Leaves glabrous or pubescent, glandular or not, narrowly lanceolate, commonly 16.5 × 3 cm., apically acute, basally rounded, truncate or cordate, subsessile or on petioles up to 1 cm. long. Floating form:Leaves floating, on weak petioles 2.5–8 cm. long; oblong or oblong-lanceolate, up to 17.5 × 4.5 cm.; apically rounded, basally rounded, truncate or cordate; glandular or not.
Morphology Leaves Ocrea
Ocreae 0.8–2 cm. long, scarcely tearing.
Morphology Reproductive morphology Inflorescences
Inflorescence a rather short, dense raceme of reddish-pink flowers, 3.5–4.5 × 1–1.5 cm., simple or with another flowering peduncle arising from the topmost node.
Morphology Reproductive morphology Flowers Pedicel
Pedicels 2 mm. long or less.
Morphology Reproductive morphology Flowers Perianth
Perianth 4–5 mm. long. Tepals 5, ovate, ± 3 mm. long.
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 5, included or exserted.
Morphology Reproductive morphology Flowers Gynoecium Style
Styles 2, united for ½-⅔ their length.
Morphology Reproductive morphology Fruits
Nut biconvex-lenticular, dark brown, shining, 2.25 × 2 mm.
Habitat
Ponds or waterways; also in wholly terrestrial habitats, and as a weed of disturbed ground
Distribution
K3 K4 North America, Europe, temperate Asia, and North Africaprobably introduced into Kenya and South Africa
[FTEA]

Common Names

English
Amphibious Bistort

Sources

  • Flora of Tropical East Africa

    • Flora of Tropical East Africa
    • http://creativecommons.org/licenses/by-nc-sa/3.0
  • Herbarium Catalogue Specimens

    • Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/3.0/
  • IUCN Categories

    • IUCN Red List of Threatened Species
    • http://creativecommons.org/licenses/by-nc-sa/3.0
  • Kew Backbone Distributions

    • The International Plant Names Index and World Checklist of Vascular Plants 2024. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2023 World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0
  • Kew Living Collection Database

    • Common Names from Plants and People Africa http://www.plantsandpeopleafrica.com/
  • Kew Names and Taxonomic Backbone

    • The International Plant Names Index and World Checklist of Vascular Plants 2024. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2023 International Plant Names Index and World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0
  • Kew Science Photographs

    • Copyright applied to individual images