Rhytidiadelphus squarrosus

Rhytidiadelphus squarrosus

Observation - Rhytidiadelphus squarrosus - UK and Ireland. Description: There are strange, white thallus-like growths on some branches of this moss. I'm reasonably certain of the identity of the moss (Rhytidiadelphus squarrosus), but what are the outgrowths? The pictures show them at various magnifications. They are about 3mm

There are strange, white thallus-like growths on some branches of this moss. I'm reasonably certain of the identity of the moss (Rhytidiadelphus squarrosus), but what are the outgrowths? The pictures show them at various magnifications. They are about 3mm across. Using google images I can find dozens of pictures of this moss, but not one that shows these outgrowths. My first thought was that they are fungal, but I really have no idea.