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Cool, it could definitely be an “interesting” specimen
By: Jason Hollinger (jason)
2019-12-25 07:18:00 WIB (+0700)

Hope you can find it again!

Yes
By: aarongunnar
2019-12-25 04:27:11 WIB (+0700)

There are some old records (50’s-60’s) of D. frostii from the southern 1/2 of the state, and 1 record of D. picta.

I may just have to go back and try to find this one again. If the photo’s GPS stamp is accurate (not always a given), it shouldn’t be too hard to find. I believe it is on a Norway spruce, in a small grove of them along a trail I frequently walk.

Glad you’re open minded!
By: Jason Hollinger (jason)
2019-12-24 09:04:02 WIB (+0700)

I hadn’t considered Dirinaria. D. aegialita does have … dactyls?, whatever those are called! … just like this. Seems too far out of its range. Do you know if any Dirinaria have been reported for Wisconsin? Maybe D. frostii on rock. That’s the only one I’ve seen in the Smokies, for example, very similar flora to yours.

Dirinaria…
By: aarongunnar
2019-12-24 02:41:45 WIB (+0700)

Is that a possibility? Hard to tell if any rhizines are visible, based on photo quality, and I am not familiar with that genus. I was just browsing around trying to find something else that at least superficially looks similar.

The soredia look too coarse
By: Jason Hollinger (jason)
2019-12-21 23:31:25 WIB (+0700)

to be Physcia americana. In fact, honestly, they don’t look like soredia at all. Like maybe they are dactyls or blastidia. If it were an option in your area I would suggest looking at something like Physcia clementei with pustulose soralia. So I’m really not sure what this is.