I think I can convince myself now that there really are both isidia and thin tomentum. Moreover, I looked at all my own photos, and sure enough, specimens in moist areas do often grow with the same Tremella-like habit and have virtually invisible tomentum. Thanks for making me take another look at it!

What a tricky photo. Good on you for getting it right off.

[EDIT: And good job, Walt, finding it. Apparently it’s an unusual find in that area, and a beautiful specimen to boot.]

At the top there three (focused) lobes; The one in the middle, which is rolled, shows white tomentum; Moreover, there is another feature that tremelloide fungi don´t have: there are some villi at the margin of some lobes, good visible on the lobe on the center-left which directly receives the light; some other lobes also have some villi on the underside.

I don’t see the tomentum underneath, and… I was going to say it doesn’t occur out east, but I see a few reports, Michigan, Georgia, Tennessee. I had no idea… Still, there should be visible isidia and tomentum. And it should be somewhat more adnate to the surface. I would be surprised if this were a lichen. That’s my two cents!

Thanks!

i love the old-school film quality to this photo.

i’ve seen this happen to Auricularia in Tenn.
not saying that’s what it is…but, the prospect of Tremella, might not be far off.

www.mushroomobserver.org/132607

Leptogium or Collema? Those two genera are characterized by, respectively, the presence or absence of a cortex, and in the field they are meant to be distinguished by differences in color and texture, but I haven’t yet reached that level of enlightenment. I may need to expand my circle of confusion to include Tremella.