We saw this lichen hiking on a trail at Pack Forest near Eatonville, WA. There are several species pictured here. Parmelia sulcata is commonly known as shield lichen. It is light gray and leafy. Evernia is prunastri is a very light green and has flat branches. Usnea hangs down, suspended from the branches. It is light green and has finer branches that resemble hair.
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