Pollinator plant

Large-leaved knotweed

Persicaria macrophylla

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Common names

1 name · 1 language
EnglishYour language
  • Large-leaved knotweed[1]
Sources & name notes (1)

Names recorded in our plant catalogue and botanical sources, grouped by language. Usage can vary by region.

Catalogue language labels are reviewed separately from botanical source records.

Numbered references identify names recorded by an external source. Other names are from our plant catalogue.

[1] Royal Horticultural Society — common names ↗

Names retained from the referenced botanical profile or table.

Source records
  • large-leaved knotweed — Common-name subtitle below main botanical heading (h1).; Bistorta macrophylla.
Plant references

Source-backed information

Published observations for this plant. Each reference supports the information beside it.

Taxonomy
Catalogue of Life treats Persicaria macrophylla as a synonym of Bistorta macrophylla.

Taxonomic treatment in the August 2026 release; the catalogue record name is preserved.

Sources [1] [2]
Botanical family
Polygonaceae

Family in the cited taxonomic treatment.

Sources [2]
Native range
Himalaya to China and N. Myanmar.

Explicit native locality records in Kew WCVP v16; introduced and doubtful distributions excluded. Continent conversion follows the documented geographic mapping.

Sources [3]
Catalogue ratings

Who this plant supports

Honey bees

Low suitability
Nectar value Low
Pollen value Unknown
Plant profile

About this plant

Large-leaved knotweed (Persicaria macrophylla) is a herbaceous plant. It flowers from July to September.

Sources and references

References for the information marked with source numbers on this page.

Sources checked
  1. Catalogue of Life Persicaria macrophylla — Catalogue of Life COL26.8

    COL26.8 (2026-08-20). Contributing checklist: Synonymic Checklists of the Vascular Plants of the World. This is taxonomic evidence, not an independent ecological study.

    Supports: Taxonomy
    Relevant sections
    • Taxonomy: NameUsage.tsv line 2605940; ID 775F5; rank species; status synonym

    Source checked on .

    Source data licence: CC BY 4.0.

  2. Catalogue of Life Bistorta macrophylla — Catalogue of Life COL26.8

    COL26.8 (2026-08-20). Contributing checklist: Synonymic Checklists of the Vascular Plants of the World. This is taxonomic evidence, not an independent ecological study.

    Supports: TaxonomyBotanical family
    Relevant sections
    • Taxonomy: NameUsage.tsv line 5006099; ID LX67; rank species; status accepted
    • Botanical family: NameUsage.tsv line 5006099; ID LX67; rank species; status accepted

    Source checked on .

    Source data licence: CC BY 4.0.

  3. Royal Botanic Gardens, Kew Bistorta macrophylla — Kew WCVP native distribution

    Native distribution and taxonomic treatment from the official WCVP v16 export (4 June 2026). The link opens the corresponding POWO taxon. Source rows are retained in the native-range audit archive.

    Supports: Native range
    Relevant sections
    • Native range: WCVP v16; wcvp_names.csv lines 709309, 1328594; wcvp_distribution.csv native locality lines 1211252, 1211253, 1211254, 1211255, 1211256, 1211257, 1211258, 1211259, 1211260

    Source checked on .

    Source data licence: CC BY 3.0.