I'm about 80% sure of the ID. If you go back, look for the two halves of the blade splitting apart, with the soredia forming on the inside. See also 590249 and 544986; the others are uncertain.
JJ Johnson
2014-08-00
Sun Aug 03 2014 14:58:55 GMT-0700 (PDT)
United States of America, California, Fort Funston, San Francisco, CA