Acmispon micranthus, commonly known as San Diego bird’s-foot trefoil, is an annual herb that is native to the coastal sage scrub and chaparral habitats of Southern California and Baja California. It typically grows to a modest height of up to 20 inches (50 cm), with a sprawling habit that allows it to cover ground effectively. The plant features trifoliate leaves, each leaflet being oval and about a centimeter long. During the flowering season, which occurs from April to June, it produces small, pea-like flowers arranged in clusters. The flowers exhibit a striking combination of red and yellow hues, which can add a splash of color to the landscape. The fruit is a narrow, bent legume pod that follows the flowers.

San Diego bird’s-foot trefoil is valued for its drought tolerance and ability to thrive in the diverse environmental conditions of its native range, including poor soils and dry conditions. It is often used for restoration projects, erosion control, and as a component of native plant gardens. In cultivation, it requires minimal maintenance, making it an attractive choice for gardeners seeking low-water-use plants. It prefers full sun to part shade and well-drained soils. While not commonly afflicted by diseases, it can be susceptible to root rot in overly wet conditions.CC BY-SA 4.0