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Parmelia sulcata
Parmelia sulcata is a foliose lichen with a generally circular thallus that can range in color from glaucous white to gray on the upper cortex; the lower surface is black. The thallus is broadly lobed.
Spotted on a deciduous limb next to the Green river.
Spotted on Dec 30, 2018
Submitted on Mar 9, 2019
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