AGM. (syn. Cheiranthus 'Bowles Mauve').  Also known as Wallflower.

A long flowering classic. Abundant spikes of mauve flowers for months, on compact bushes, clothed in evergreen lance-shaped grey-green foliage. Suitable for sunny borders with well-drained soil. Flowers late Spring - early Autumn. Height & spread approx 60cm x 45cm (24in x 18in).