A mat-forming evergreen perennial herb, growing on walls, rocks and roadside banks. Lowland.
S. spurium was introduced to cultivation in 1816. It is often grown in gardens and frequently escapes to form very persistent colonies; it was known from the wild by 1910. The many new records since the 1962 Atlas probably indicate a real spread rather than better recording of aliens.
Native of the Caucasus; widely naturalised in temperate W. Europe.
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