A bulbous perennial herb, formerly widely grown as an ornamental and readily becoming naturalised in gardens and on waste ground. It spreads rapidly by easily detached bulblets that are resistant to all but the strongest herbicides, and in places it has become an almost ineradicable weed. Lowland.
Introduced in 1826, O. debilis has spread slowly, despite its weedy nature and ability to become naturalised. It was recorded in the wild by 1900.
Native of temperate S. America.
Count of 10km squares in Great Britain: 137
Count of 10km squares in Ireland: 10
Count of 10km squares in the Channel Isles: 12
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.