#punctelia rudecta

Punctelia rudecta

Rough speckled shield lichen, speckleback lichen

Some super common macro lichens in the midwest you can readily learn. Generalized to mainly wood surface and not super generalized on rock.

Common Greenshield Lichen, Flavoparmelia caperata

vs

Punctelia rudecta, and recent split Punctelia missouriensis (see those white speckled lobes. during full developement and we see a different colored isidiate core. this is why it’s commonly known as the rough speckled shield ) (this concept can be seen in the lower specimen.) (The upper though developes consistently less isidiate core and instead has overlapping squamulobes which gives it a mealy look.) (Called Mealy Speckled Shield lichen.)

What isn’t as common is large thallus mats with proper apothecia developement. Its like a light blue core if it’s the case unlike moon glow lichen which has a brown apothecia core and smooth axle bristle which looks green when hydrated and has an orange like tint when dry. imishaga doesn’t seem to produce apothecia or an isidiate core while rough speckled can produce both though the apothecia are supposed to be small like seen above on this Quercus muehlenbergii

the green shield will be smooth, baltimore green shield is a rock species where as smooth(rare) and common are both on wood, not an isidiate display, and fully same colored thallus wet or dry.