Flower ID?

This is growing just by the bird table, so may be from a seed in the birdseed:



Shortly after I took this photo the petals fell. it has several flowerheads and alternate leaves all the way up the single stem. I don't recognise it at all.

 

Think its Flax. Liz. the flowers only last a few hours in the morning.

 

Yes - I agree with Pete. Long grown commercially for linen and linseed oil

 

Right, thanks- probably was from the bird table then. I have seen flax growing in a field [not close up] it was a much darker blue. Different variety?

 

Yes you can have blue flax too

 

Anybody know what this wildflower is called please? Looks a bit like Liz's above but it's been flowering for some time now. We were given a pack of mixed wildflower seeds at a gardening exhibition but there was no indication of names.
Think it's such a pretty little flower. Any idea Hornbeam? - you seem to be quite good with wildflowers. :D

 

Pretty certain that it is Corncockle (Agrostemma githago) Once a very common flower of corn fields and originally from the Mediterranean. Sprayed to death and now very rare in the wild. Only ever seen in wild flower gardens - so cherish yours :D It is an annual, so if you want to keep it you will need to save seeds

 

The seed is quite disinctive, being black and sharp angled. It was this that made it unpopular in corn fields, as it was not good ground into flour.

 

Hornbeam and Fran - thanks for info. It seems to be running wild at the moment but will save some seeds.