Split USDA records into concept-based and nominal sets
++ This bug was initially created as a clone of Bug #2640 ++
Look at PERSBOR s.s. with all those records for NC, SC, GA, AL that are
actually P. palustris. We need a solution.
3. These lists contain sets of taxa that should be treated as nominals rather than USDA/JK99 concepts. We should break the USDA taxa in our database into two groups with one = USDA concepts, and the second = nominal concepts. We can assign this step to Mike Lee. I will need to explain to Michael now to access the database in which the county occurrence data are stored.