Looks like 'Miss Bateman', group 2 prune out any weak and dead stems late winter early spring then cut stems back to highest pair of strong growing buds, lovely clematis I have it too :-)

From here it looks like it could be Clematis florida 'Sieboldii', a large, late flowering type.
It's a group 3 pruning which means a hard prune because the flowers will be produced on that current years growth.

I'm wrong !
Simbad's absolutely right, it IS Miss Bateman :-))

Yes, I agree - I've got her in my garden as well. I hope she's all right, though - one of her stems died back last year! Lovely Clematis. :-)))

Have a look at www.clematis.hull.ac.uk you should find all you need to know on Clematis. Happy Gardening

Thank you !
:)

This web site for clmatis is fantastic... :)
I search little bit and find this clematis:
http://www.clematis.hull.ac.uk/new-clemdetail.cfm?dbkey=2088
Barbara Wheeler...
Maybe..it is Barbara...
It also group 2, so I will cut like you tell me Sinbad..

Thanks girls... and boys... :)