Clematis (alpina?) (for my file)

Lucky you.....a lovely freebie.

Nice Siris, a similar colour to Alpina 'Willy'.

Thorny, it definitely is not pink and is double.

Mine isn't pink either Siris, more mauve with cream inside although if you look it up some are blue. My label, what's left of it, says "mauve/pink with cream anthers". There is a photo of it on here back in the spring. Years ago I had 'Pauline' but lost it. This was a similar blue to your "baby". Yours is very nice anyway, maybe a new one!

I can't understand how it came to grow in one of my seedling pots, it is a mystery but am happy and will find a place in the garden for it.

Yes, Thorney just looked up Pauline, she does look similar.
Still trying to think where to put Baby blue. Think back fence border 1/2 way along,but there is a large flowered Blue there, but really nowhere else.

Lovely surprise !
I found a Passion flower seedling growing in the border the other day , never had them self seed before !

Really Simbad, self seeds a nuisance here.