AppearanceThis is a herbaceous perennial, often grown as a biennial, with one or more highly branching stems reaching heights of 15–80 cm. The leaves are generally narrow and pointed and may be up to 20 cm long. The top of the stem is occupied by a club-shaped inflorescence of strongly scented flowers. Each flower has purplish-green sepals and rounded petals which are two to three centimeters long and in shades of bright yellows to reds and purples. The flowers fall away to leave long fruits which are narrow, hairy siliques several centimeters in length.
NamingThe common name "wallflower" attaches to all cultivars of this plant, as well as other species within the genus ''Erysimum'' and the former genus ''Cheiranthus''.
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