Yes, it looks like Buddleia alternifolia. It does indeed look quite different from the familiar B. davidii and B. globosa. There are a number of species less well known (and less hardy) that inter-grade in form between each other including this. The individual tubular pink-purple flowers held in small rounded clusters along the arching stems are the same structure as the others so mark it out as a true member of said genus even though it differs in vegetative form from the more familiar ones.

thanks very much, I didn't know that.
I can check it out now.

ps, I presume it's not staying in that pot as a house plant? ;-)

no,.. lol, I brought it in to take the pic as it was raining.