Erysimum is a herbaceous perennial or an annual or a sub-shrub depending on the region. Also known as Wallflower, this plant has many wild forms, ranging in colors (red, pink, maroon, orange, yellow, and purple. Erysimum also has a compact, shrub-like growth habit with the tiny blossoms adorning the green foliage. The plants eventually develop a woody base. Attracts butterflies.