Appearance
It is a semi-evergreen perennial, with 10 cm stems of narrow blue-green leaves and clusters of rose-pink flowers at the tips in spring and summer. It is popularly grown in rockeries or alpine gardens; and it occasionally becomes naturalised outside of its native range, especially on old stone walls, shown well from a well-known location for this species on the old packhorse bridge at Carrbridge in the Highlands of Scotland.References:
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