I planted two different salvias this year. One is marked S. nemorosa 'May Night' and the other has no species name but is called Blue Queen. The plants look very similar. I just did a web search for info on these two plants and now I'm confused. While searching for Blue Queen I found some sites that assign it as S. xsuperba and others that say its S. nemorosa. Anyone know which it is? Terry E. WA. zone 4