Callophrys affinis, the Western Green Hairstreak, can be found in WA,OR,ID,WY,UT,NV,AZ,NM, and CA.
Favorite nectar plants include: Bidens, Ceanothus, and Symphyotrichum
USDA Growing Zones for these plants include: 2,3,4,5,6,7,8,9,10

Host plants:
Eriogonum flavum
Eriogonum umbellatum
Eriogonum compositum
Eriogonum fasciculatum
Eriogonum heracleoides
Eriogonum latifolium
Eriogonum nudum
Eriogonum wrightii
Eriogonum
Lotus argophyllus
Lotus crassifolius
Lotus oblongifolius
Lotus scoparius
Lotus strigosus
Lotus