Erysimum cheiri, commonly known as wallflower, is a flowering plant belonging to the mustard family, Brassicaceae. It is native to Europe and is often found growing in rocky or disturbed areas. The plant typically features clusters of bright yellow, orange, or purple flowers that bloom in spring and early summer, attracting various pollinators. Wallflowers are biennial or perennial plants, meaning they can live for two years or more. They thrive in well-drained soil and full sun, making them popular in gardens and landscapes. Erysimum cheiri is also known for its pleasant fragrance, adding to its appeal as an ornamental plant.