A large perennial herb which is established in grassy places and on waste ground, where it arises from discarded garden material. Lowland.
A. laevis was cultivated in Britain by 1758 and is quite widely grown in gardens. It had been recorded from the wild in 1894 (Mid-W. Yorks.). It may be under-recorded.
Native of N. 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.