The white crust fungi, I haven’t been able to identify, as yet.
Rehydrated Crystal Brain (Myxarium nucleatum), above and below. If you look closely you can see the Calcium oxalate inside.
I cut into a section, to show the granules inside.
Dessicated Myxarium nucleatum, above and below. The granules are now clearly visible on the bark.
Under the microscope you can see the basidia look like jellyfish.
I squashed one of the granules as best I could, and viewed it under the microscope.