Description: Wings delicate, 22 - 28 mm (0.86 - 1.10 in.) wingspan. Males lilac blue with a brownish border, females similar but darker in color. Larval host plant Torrey milkvetch (Astragalus calycosus). Flight season from July to August; with peak activity late July.
Diet: Nectar sources include Torrey milkvetch, aster (Aster sp.), fleabane (Erigeron), and goldflower (Hymenoxys).
Habitat: Open areas such as ridge lines, ski runs, and avalanche paths in bristlecone woodlands or mixed conifer forests that support the larval host plant, Torrey milkvetch. Elevations: above 2,000 m (6,560 ft).
Range: Endemic to the Spring Mountains. Known from the ski area in Lee Canyon; new observations include Bonanza Trail, main crest between Griffith Peak and Upper Carpenter Canyon, and North Loop Trail.