An annual, formerly often a persistent weed of arable land. It is now a rare casual of waste places, originating from grain, bird-seed and wool shoddy. Lowland.
L. temulentum, first recorded in Britain by 1548, was formerly a serious weed of arable land. It had almost disappeared from this habitat before the Second World War. It continues to be recorded as a casual, but less frequently now than in the 1950s and 1960s. It is sometimes toxic to humans and livestock (Cooper & Johnson, 1998).
Perhaps native of the Mediterranean region and S.W. Asia, but native range obscured by its spread with cultivation; once widespread in Europe and naturalised in Japan, N. & S. America, Australasia and elsewhere.
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