I inadvertently posted to NWLeps! It was intended for another list...and I goofed.
No matter! Regarding fig. 23 in Opler et al, there is that one specimen from McDonald Forest, Benton County.that sequencd out as Anthocharis sara. Otherwise, that taxon is restricted to SW Oregon as per the attached fig. 9 from Stout, 2108. I suspect a mislabeling as students making collections are wont to do.
That said, it is worthwhile to be diligent, as I know you are!
Here is a link to Todd's paper: