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Recorded by D. J. Galloway. Rocks in rock garden.
Green/gray fungi, uneven edges.
On bush, about 3-6 inches diameter, roundish shapes
Net-marked parmelia (Parmelia sulcata), or Shield lichen, is a lichen in the family Parmeliaceae. It is very tolerant of pollution and is widespread, making it one of the most common lichens.