Usnea lichen (aka Old Man's Beard, Beard Lichen, Treemoss, and Methusela's Beard Lichen) (Usnea longissima or Dolichousnea longissima) on a Bigleaf Maple (Acer macrophyllum) with autumn leaves in the Staircase Rapids area of Olympic National Park, Washington, USA, October, Olympic_Peninsula_Autumn-868