Limnanthes alba is a species of flowering plant in the meadowfoam family known by the common name white meadowfoam. It is native to California and Oregon, where it grows in wet grassy habitat, such as vernal pools and moist spots in woodlands. It generally grows in poorly drained soils. It is an annual herb producing an erect or decumbent stem up to about 30cm long. The leaves divided into several lobed or unlobed leaflets. The flower is cup-shaped with white petals 1 to 1.5cm long.