Size: Up to 0.75 inches wingspan
Key ID features: Small. Males dusky blue above with darker wing borders. Female dark brown. Below white or off-white with bold black spots, larger on FW, boldly checked fringes on FW.
Similar species: No other similar species in Oregon.
Host plant: Eriogonum spergulinum (Spurry buckwheat).
Habitat: Pumice lands east of Crater Lake near host plant.
Range: 6 square mile area east of Crater Lake.
Season: Mid-June to late July
Conservation Status: USFS Sensitive Species. Was proposed to be listed as Endangered under Federal Endangered Species Act, but after a 5-year review, listing was judged to be "not warranted."