Clematis Alpina

The clematis on my balcony are in bloom - again. Each year in spring I am astonished at their ability to survive the winter out there. 

When I first uncovered them this year (I wrap them up in fibre cloth for winter and hope for the best...), I was almost certain that the one on the left must have died, as there were no signs of life at the bottom...

Further up on the trellis, the branches of the two plants are all entangled in each other though, and it's impossible to sort them out from one another. 

 So one has to wait for the flowers before one can tell.

And again it turned out that after all there is still life in both plants - revealed by the fact that the flowers are different colours!