Pontia beckerii, the Becker's white, Great Basin white, or sagebrush white, is a butterfly in the family Pieridae. It is found in western North America from Baja California, Mexico to southern British Columbia, Canada.[1]
It is mostly white with small black markings; females have more dark markings. The species is similar to other checkered whites such as, Pontia sisymbrii, Pontia protodice, and Pontia occidentalis.[1] [2]
The wingspan is 33 to 48 millimeters.[1]
The host plants are Isomeris arborea, Stanleya pinnata, Brassica nigra, Descurainia pinnata, Sisymbrium altissimum, Sisymbrium linifolium (syn. Schoenocrambe linifolia), Lepidium perfoliatum, Thelypodium sagittatum, and Thelypodium laciniatum.[3]