Size: 1.25 - 1.75 inches wingspan
Key ID features: Above, male white with black or gray markings on forewing, female has more extensive markings on both wings. Below gray-green margins along hindwing veins.
Similar species: Co-occurs with Checkered White in SE Oregon. Difficult to ID in flight, may need to net. Female Checkered White is less sharply marked, often with olive or brown shades instead of gray-black.
Host plant: Many native species in the mustard family.
Habitat: Open habitats, including woodland openings, mountain meadows, and barren areas above tree line.
Range: Throughout Oregon west of the Coast Range.
Season: Mid-March to mid-September
Conservation Status: Secure