They hummers don't seem to like the other cannas as well as they do the canna indicas. Not sure why
Also what about Ipomoea quamoclit (cypress vine). I know they like this vine as well.
It may just be odd but they also loved my Magnolia tree. DD Blanchard Magnolia. I'll look up and do some more research on this one first though.
Hope your having a Merry Christmas