Hmm...Not Irish moss. Irish moss looks kind of like little spider plants.
That looks more like a kind of sphagnum moss. I'm not a moss expert though. As long as it's not damaging the bark it shouldn't harm anything I wouldn't worry too much.
Ooohhh...thanks BThis is Irish moss:
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It looks like the moss I mostly find in the forest here. (Netherlands / Europe).European species.
If it can make it from Ireland to Alabama, the Netherlands is a day trip!It looks like the moss I mostly find in the forest here. (Netherlands / Europe).
And from Alabama to NW Washington ...If it can make it from Ireland to Alabama, the Netherlands is a day trip!