My 2 cents...
Melanelia hepatizon, very common from Alaska to northern Rockies. It also pops up in Coast Range and Cascades in Oregon mid to high elevation, but I only have a couple of records.
Montanelia panniformis, Seems to be very widespread in western states, occurring in low elevation to montane. Maybe locally common? I feel like I see it when looking for Umbilicaria and Stereocaulon but don't usually collect it.
I think that both of these fall into the category of species without that many collections in the PNW, but if more people were looking at rocks they wouldn't be that hard to find.
