A large, well-branched perennial herb, rarely grown in gardens but naturalised on river shingle, roadside verges and waste ground in a few localities. Reproduction is by rhizomatous spread. Lowland.
The species was introduced into cultivation in 1816 and first reported from the wild in 1909, when it was discovered on the coast between Innellan and Dunoon (Main Argyll).
Native of the mountains of S., C. & E. Europe and Asia.
PLANTATT - Attributes of British and Irish plants. (.zip 1455KB) This dataset was compiled and published in 2004, and last updated in November 2008. Download includes an Excel spreadsheet of the attributes, and a PDF explaining the background and nomenclature. Note that the PDF version is the booklet as published, whereas the Excel spreadsheet incorporates subsequent corrections. A hardcopy can be purchased from the Centre for Ecology and Hydrology.
Atlas text references
Jalas & Suominen (1979)
1981. Docks and knotweeds of the British Isles. Botanical Society of the British Isles Handbook no. 3.
1965. Vergleichende Chorologie der zentraleuropäischen Flora. Volume 1. 2 vols.