Biennial or perennial herbs. Leaves of two kinds: those of basal tufted rosette variously waved, toothed or lobed, the stalks long and grooved; stem leaves reduced. Flowers yellow or white in terminal clusters; sepals and petals 4. Fruit a silicula.
Seed, cuttings or root division.
Formerly included in Alyssum but differing most clearly in having stem leaves much smaller than those in the basal rosette.
About 7 species from C and S Europe and W Asia.
Source: (1997). Brassicaceae. In: . Horticultural Flora of South-eastern Australia. Volume 2. Flowering plants. Dicotyledons. Part 1. The identification of garden and cultivated plants. University of New South Wales Press.