lichen-Parmelia squarrosa

Parmelia squarrosa

Parmelia squarrosa

Parmelia squarrosa photo by Ray Showman

DIAGNOSTIC FEATURES: Squarrosely branched rhizines; lobes patterned-maculate; isidiate; medulla K+ yellow turning red; compare with Parmelinopsis minarum, C+, P. sulcata, which is sorediate, and P. saxatilis very similar but with rhizines simple and unbranched (not known from Ohio).

ECOLOGY: An eastern US species common on trees, more rare on rocks; scattered in Ohio but more common in the east and southeast.

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