Hi Woodyoak. I just now looked at my 'Blue Moon' wisteria vine and really couldn't find spurs like the white American wisteria picture that you have attached. All buds looked exactly the same. Granted some were a little larger than others, I couldn't tell a difference. Since the flower buds don't form on 'Blue Moon' until the new vines start growing, it's really tough to know if buds are really there at this point. All I know is I get a very full colorful display of hundreds ore racemes each year.

The spur structures, I find, are not the only places the flower buds develop, but the presence of - and quantity of - the spurs are strongly related to the floriferousness of the vine. The spurs look quite different on the Chinese vs. the Japanese vines. Even if you see no spurs, I'd love it if you can post a picture of the vine in its winter 'naked' state just so I can see how different it looks compared to my Asian ones. I cannot find any pictures on-line that show a reasonable close view - so you'd be adding to the knowledge-base out there if you could post such a picture (or two....)!