Dibaeis baeomyces. I found this lichen growing on a large rock and I just had to include on here because it is so pretty.
Microscopic view of the lichen. Asci spored, fusiform, 12-18 x 2.5-3 microns.
White Brain (Exidia thuretiana) above and basidia below. This patch must now be approximately 35 cm across.