Evernia
2 species
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Evernia prunastri
Description: Thallus with dichotomously branched branches to 70 mm in length, 2-4 mm in width. Upper surface pale greenish yellow, lower surface very pale to white.
Distribution: Washington; northern British Columbia to southern California, Idaho, Montana.
Habitat: In shade or sun.
Substrate: Trees of all kinds, rarely on rock walls.