Size: 1.5 - 2.0 inches wingspan
Key ID features: Males above, bright lemony yellow with unbroken black border. Females above lighter yellow or cream, with less distinct black border. Below, central pearly "discal" spot in HW with single pinkish-brown ring, and few or no submarginal black or brown spots. HW below has black over-scaling, giving it a green cast.
Similar species: Clouded Sulphurs have heavier submarginal spots on HW below. Queen Alexandra's Sulphurs are larger, greener below, and usually lack pink discal spot-rim below.
Host plant: Many species in the pea family.
Habitat: Meadows, roadsides, dry steppe slopes and forest glades.
Range: Mountain ranges throughout Oregon, except Coast Range.
Season: early March to early November
Conservation Status: Secure