Erysimum asperum, commonly known as Western Wallflower, is a perennial herb that is native to a variety of habitats including grasslands, open woodlands, and rocky slopes, generally east of the Continental Divide and west of the Mississippi River in west-central Canada, the west-central United States, and northern Mexico. It typically grows to a height of 2-3 feet and a width of 4-5 feet. The plant features narrow, lance-shaped leaves and clusters of bright yellow, four-petaled flowers that bloom from late spring to early summer, adding a splash of color to the landscape.

Western Wallflower is valued for its vibrant flowers and ability to attract pollinators such as bees and butterflies. It is used in wildflower gardens, as a border plant, and in naturalized areas where its drought tolerance and adaptability to various soil conditions are beneficial. While it prefers part shade, it can also tolerate full sun if provided with adequate moisture. It is important to ensure good drainage as the plant can be prone to root rot in wet soils. There are no major disease issues, but it can occasionally suffer from fungal infections if conditions are too damp.CC BY-SA 4.0