Size: 1.3 - 2.3 inches wingspan
Key ID features: Males above, bright orange with unbroken black border. Females above either bright orange or greenish white with "window" spots breaking up black border. Below, central pearly "discal" spot on HW with small satellite spot, and two pinkish-brown rings, and submarginal row of black or brown "eurytheme spots."
Similar species: Western Sulphur and Clouded Sulphur are lemony yellow, lacking orange. White females difficult to separate from Clouded Sulphur, but often HW border is stronger in female Orange Sulphur.
Host plant: Many species in the pea family.
Habitat: Most commonly seen in meadows, pastures, fields and other open habitats.
Range: Throughout Oregon
Season: Late March to early November
Conservation Status: Secure