wolf lichen letharia vulpina growing on the bark of pine trees in lassen volcanic national park, northern california

america bark brightly california close closeup colored common conifers contrast copy delicate detail dye europe european forest fungus green growing homeopathy lassen letharia lichen macro medicine moss mountains national native natural nature northern northwest outdoors pacific pale parasite park pigment pine poisonous poultice space states toxic tree trees trunk united usa volcanic vulpina western wolf woods yellow