Platismatia Stenophylla, Ribbon Rag Lichen

Day 105: The Pacific Northwest has its share of Rag Lichens, so-called because they have the feel of a damp dishrag when touched. Many of the species are quite "leafy," and can often be found growing on old cedar fences as well as tree branches. At least two are more "lacy" in appearance: Platismatia stenophylla (above) and P. herrei. Both of them form loose clusters which frequently become dislodged during wind events. I've learned to differentiate them on sight, but in the early days of my lichen adventures, I had to put them under the microscope to check for isidia/soredia (reproductive structures), present in P. herrei but absent in P. stenophylla.