LITTLE CLEMATIS

As a thank you, someone bought me a little clematis plant in a very small pot from a supermarket.  It had no name.  It didn't take me long to realise that it was very unhappy in the pot and I didn't really have space to plant it against a fence.  All the same, I stuck it in the ground between two roses: Compassion and Princess Alexandra of Kent.  The clematis seems to be quite happy between its thorny companions and is producing flowers. I stuck a stick in front of it to try and hold it against the trellis until it managed to 'get a grip'.  It seems to managing quite well although it is only about 30cm high right now.  

Please, powers that be, don't let it turn into a monster that I have to hack down to spare my roses. Somehow, I don't think it will.