Any ID help would be greatly appreciated.

I found this lichen on a partially burned (but still living) maple tree on a busy city street in Portland. The lichen is only present on the burned portion, growing between the pieces of outer bark, and the only thing I can see are these tiny red isidia with whitish/cream tips.

I studied the isidia with a microscope (squished) so I can confirm there are green algal cells, hyphae and spores present. The spores are oval, septate with 2 spores on each side. 

Photo 1: The lichen! 

Photo 2: The substrate, a burned tree.

Photo 3: Lichen & fungi on the burned areas.

Thank you, Daphne! I will try to cross section it, it's so very tiny. I will take some more photos, too.

I took another sample and it is indeed non-lichenized fungi with some free-living algae. Thank you both! I'm off to investigate Neonectria.