Shield Lichen

By the way, Mychorriza cyanobacteria does not exists!

Hi Malcolm, now with those close ups it is much more clear. Your lichen is Parmelia sulcata. The white networks that can be seen know on the lobe surfaces are very conspicuous and characateristic of P. sulcata. Sorry if a misguided you, the first two pics looked very different to me the first time but now there is no doubt.

Thanks for the help Arlanda. I have posted 4 more close-up views, cropped from the original, but the quality is not good due to the poor light. If there is any other area I can send the raw image direct to you for perusal.

Hi jbstrange2202, thank you for your suggestion, however, it is not a valid suggestion. Firstly, Foliose lichen is not a Common name, it is a term used to describe the entire group of lichens which look like foliage (leaves). Secondly, mycorrhiza is a symbiotic association between a fungus and the roots of a vascular plant, not part of a scientific name, which is made up from the Latin Genus + species. Thirdly cyanobacteria is a phylum of bacteria that obtain their energy through photosynthesis. A phylum is a taxonomic rank between Kingdom and class, so much higher than Genus and species which are the lower end.

It is a foliose lichen, either Physcia or Pheophyscia. Probably Physcia tenella but higher magnification is needed to see the black cilicia. I have a similar one: http://www.projectnoah.org/spottings/149....
P. tenella appears together with P. ascendens, Phaeophyscia orbicularis and Xanthoria sp. in urban areas since these lichens are more tolerant to nitrogen rich environments
Please, consider to add it to the lichens mission: http://www.projectnoah.org/missions/8624...