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When: 2004-10-04

Collection location: Onion River, Cook Co., Minnesota, USA [Click for map]

Who: Jim Sogaard

No specimen available

On unidentified, presumably igneous rock face in gorge.


Proposed Names

-30% (2)
Recognized by sight
85% (1)
Recognized by sight

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= Observer’s choice
= Current consensus


Add Comment
By: Jason Hollinger (jason)
2022-01-14 12:05:28 CST (-0600)
Film was a miracle
By: Jim Sogaard
2022-01-14 11:16:37 CST (-0600)

But a kinda clunky miracle. May it RIP!

Yeah, my slides didn’t scan well either
By: Jason Hollinger (jason)
2022-01-14 11:02:40 CST (-0600)

There must be a super expensive high-quality service somewhere, but I just chose to cut my losses. Of course, I didn’t have such nice slides as you do! :)

Jason. Thanks!
By: Jim Sogaard
2022-01-14 10:47:34 CST (-0600)

Physcia was on my short ‘guess list’.
My slide scan images are disappointing. Wish I had a better sense of why. Or better still, how I might improve them.

Almost certainly
By: Jason Hollinger (jason)
2022-01-14 10:15:22 CST (-0600)

Physcia caesia or P. subalbinea, just based on personal experience in the area. But your photos unfortunately don’t show sufficient detail to determine the position of the soralia on the lobes.