Lichens are composite organisms composed of fungal species in a symbiotic relationship with algae and/or cyanobacteria. Although lichens are classified and named based on the fungal component, they are here presented separately from fungi for convenience of access.
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.