An erect annual of cultivated ground, disturbed areas and paths, in shaded or semi-shaded situations. It spreads by seed or occasionally by underground rhizomes. Seed is freely set by self-pollination, and forcibly ejected from the capsules over a distance of up to two metres. Lowland.
O. stricta was cultivated in Britain by 1658 and has long been frequent in S. England; it was recorded from the wild by 1823. It has spread westwards since the 1962 Atlas. Most populations are casual, but is has been known to persist for many years in some places.
Native of N. America and E. Asia; extensively naturalised in temperate Europe.
Count of 10km squares in Great Britain: 396
Count of 10km squares in Ireland: 27
Count of 10km squares in the Channel Isles: 4
Atlas Change Index: -0.09
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
1985. Biology of Canadian weeds. 71. Oxalis stricta L., O. corniculata L., O. dillenii Jacq. ssp. dillenii and O. dillenii Jacq. ssp. filipes (Small) Eiten. Canadian Journal of Plant Science. 65:691-709.
1986. Atlas of north European vascular plants north of the Tropic of Cancer. 3 vols.
1978. Vergleichende Chorologie der zentraleuropäischen Flora. Volume 2. 2 vols.
1998. Plant crib 1998.
1958. Oxalis in the British Isles. Watsonia. 4:51-69.