A perennial herb, occurring as a garden escape or outcast on waste ground, roadsides and banks, along railways, on pavements, walls and rubbish tips, and in quarries. Lowland.
L. purpurea was introduced into cultivation by 1648 and is a popular garden plant with several named cultivars. It was known from the wild by c. 1830 (Middlesex), and its distribution has greatly increased since the 1962 Atlas, probably due to both better recording and a genuine spread.
Native of C. & S. Italy and Sicily.
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