wet sample.
white medulla, white pimples (papillae) below apothecia
The largest I've seen in the Bay Area (!)
On hemlock twig found on ground. Medulla K+ pale yellow, C+ red, KC+ red. Branches flattened,convex and pale greenish white on upper surface and concave with blotchy black and white on lower surface. Isidiate including branching isidia on branch tips.
growing on soil with Peltigera. Several extensive colonies.