Clematis scottii

Surprisingly large (to more than an inch in diameter) rounded violet flowers are produced on lax stems up to about 18ins long in spring and summer followed by feathery seed heads. The foliage is greyish green pinnate. 

Plants die down completely in winter. In time will build up into a hefty clump of fine-cut foliage with the flowers held above, a bit like some sort of giant Pulsatilla. 

Easy to grow here in large pots, over-wintered in the tunnel, but better in a sunny, very well drained spot outside, especially in the drier parts of the country. Exciting plants.
3L tall pots ~ £21