A vigorous rhizomatous perennial herb occasionally naturalised in disturbed areas, on waste ground, roadsides and seashores, but always associated with human habitation. It reproduces mainly by semi-woody rhizome fragments, though some seed-set is reported. Lowland.
O. articulata was introduced in 1870, and is now frequently grown in gardens as an ornamental. It was known from the wild by 1912, and is thought to be increasing, although such changes are difficult to assess.
Native of temperate S. America.
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.