Olneya is a genus of flowering plants in the family Fabaceae, commonly known as the legume, pea, or bean family. It includes several species, with Olneya tesota being the most well-known. This species is native to the arid regions of the southwestern United States and northwestern Mexico, particularly in the Sonoran Desert. Olneya tesota is a deciduous tree that can grow up to 30 feet tall. It features distinctive gray bark and produces small, fragrant white to lavender flowers. The tree is well-adapted to dry environments, making it an important part of its ecosystem, providing shade and habitat for various wildlife.