This plant is well known, I do actually know its name but hesitate to mention it in case it might be illegal to propogate! It is climbing all over its companions and looking absolutely wonderful. Being sterile it just keeps on flowering. I would like some more but obviously seeds are not going to develop.
I would also like to know if a sterile hybrid is any use to the bees, they swarm all over it, but I don't know if their search is in vain - does it actually have any nectar?