Hi robberfly - The width of the straps, plus the presence of soredia in the middle of the strap, plus the long linear soralia along the edges (as opposed to "pop beads"), all point to R. subleptocarpha.
Liam O'Brien
2015-01-00
Thu Jan 08 2015 15:22:43 GMT-0800 (PST)
United States of America, California, Billy Goat Hill Park, San Francisco, CA, US