A rhizomatous perennial herb found as a garden escape on grassy or wooded banks and roadsides around habitation; also occurring as a garden throw-out on rubbish tips and waste ground. Lowland.
G. endressii, introduced to Britain in 1812, is common in gardens and has been recorded in the wild since 1906. It has increased since the 1962 Atlas, although some records may be errors for G. x oxonianum as several cultivars of the hybrid are very similar to this parent. The frequent cultivar `Wargrave Pink` is probably also a form of G. x oxonianum, though Yeo (1985) considers it to be a cultivar of G. endressii.
Native of the Pyrenees; the native range is very restricted.
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.