Erysimum is a genus of flowering plants in the family Brassicaceae, commonly known as the mustard family. These plants are often characterized by their bright yellow, orange, or purple flowers and are found in various habitats, including gardens and wild areas. Erysimum species are known for their ability to thrive in poor soil conditions and are often used in ornamental gardening. Many species of Erysimum are also referred to as wallflowers due to their tendency to grow in rocky or wall-like environments. They are popular among gardeners for their attractive blooms and ability to attract pollinators like bees and butterflies. Some species, such as Erysimum cheiri, are particularly well-known for their fragrant flowers.