Appearance
Thallus pale gray, spotted with white maculae; lobes thin, appressed to somewhat ascending, 0.3-1(-2) mm broad, margins (especially the tips) finely divided and finally dissolving into granular soredia; lower surface white, with pale rhizines. Apothecia very common, under 1 mm in diameter, dark brown, often lightly pruinose.Soralia marginal; soredia granular.
Naming
Physcia millegrana Degel., Arkiv før Botanik 30A (1): 56 (1942)
Habitat
A pioneer species colonizing young bark, sometimes rock. Tolerant of air pollution and so commonly found in urban environments.References:
Some text fragments are auto parsed from Wikipedia.
https://en.wikipedia.org/wiki/Physciahttps://ohiomosslichen.org/lichen-physcia-millegrana/
http://www.mycobank.org/name/Physcia%20millegrana&Lang=Eng
https://www.muskokawatershed.org/wp-content/uploads/LichenID.pdf
Wetmore, Clifford M.. (2005). KEYS TO THE LICHENS OF MINNESOTA. Retrieved from the University of Minnesota Digital Conservancy, http://hdl.handle.net/11299/156243.
