Usnea

Or “Old Man’s Beard” grows vigorously (if that is possible for a lichen) in Strathfarrar because the air is clean and high quality.
The glen is closed to vehicles in the winter so I parked at the gate and headed in on Shank’s Pony.
Sadly my desired hill summit was too elusive in the driving snow and wind so I had to settle for a damp wander in the glen.