Hi Lari Ann,
I think I found some pics of the true Black Mac and I see what you mean about the difference. Does the sterility of A. plumbea suggest a very vigorous plant if a natural hybrid?
Questions re: terminology.
You've placed "A. plumbea" in quotes. Because it's no longer an accepted species?
You've placed "nigra" (A. macrorrhizos "nigra") in quotes and lower case. Because it's a natural variation?
Is this typical convention? With folks growing and selling these plants how should the DB address them?
Thanks,
