A few Small hairs on margins, per Tom Carlberg, who also said that this wasn't a good example On fallen twig underneath an Oak tree. Prior comment from Tom Carlberg...'There's three common species of Ramalina in California that have apothecia: R. leptocarpha, R. puberulenta, R. menziesii. The second is minutely hairy, the last forms nets, and the first is in your photo. There's also R. dilacerata, but it's not known (yet) from the Bay Area. It has main branches that are partially hollow.' So R. puberulenta because of the minute hairs, right?