I am trying to verify species names for a cumulative index and would like help tracking down synonymy for some Viola species names mentioned in early issues (beginning in 1941), which I can't sort out via internet search. Would someone like to help out with this? I will need currently accepted synonyms or evidence that the name itself is currently accepted.
Sometimes I'll consult other references, but those are the top three I go to. If native American violets are also being considered, then the USDA Plants Database is helpful, too.
Good luck, and if you have any specific questions, you might be able to shoot a few of them up here to see what people say.