Challenging coastal lichen

Challenging coastal lichen

Observation - Challenging coastal lichen. Description: White, seemingly ecorticate crust sheltered by overhang on siliceous coastal rock (photos 3 & 4). Thallus C-, K-. Dotted with black, sessile pycnidia, some pruinose. Conidia 4-6 x 2µm, colourless, narrowly ellipsoid to bacilliform. I should probably ha

White, seemingly ecorticate crust sheltered by overhang on siliceous coastal rock (photos 3 & 4). Thallus C-, K-. Dotted with black, sessile pycnidia, some pruinose. Conidia 4-6 x 2µm, colourless, narrowly ellipsoid to bacilliform.

I should probably have walked past this one!