Old Man’s Beard or Beard Lichen Usnea, like other lichens, is a symbiosis of a fungus and an algae, that grow like leafless tassels on tree bark or twigs. It is thought that Usnea may be a valuable addition to herbal formulas for sore throats and skin infections, since its chemistry contains anti-bacterial properties. Manaton Rocks, Dartmoor.
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