Over the years I've grown quite a few Dracocephalum species, including D. argunense. I've also grown an extremely similar plant, which originally came to me as D. ruyschiana. I've compared the two dozens of times, and I've never been able to really distinguish between them. I've consulted with some of my BNARGS Chapter members, including Lori Chips and Anne Spiegel, and in general everyone seems to agree that what I've got, and what everyone else in the Northeast has got, is D. argunense. I've not been able to find anyone who actually is growing D. ruyschiana, and I'd like to get either reliable seed or a plant or two so I can grow them and see the differences in real life. Any suggestions? Any experience with D. ruyschiana?