Help Plant Ident

Sorry this is my first post and I seem to have lost the text!

Can anyone help me identify the mystery plant in my garden. Its a herbaceous perrenial that stands about 4-5ft high with white cow parsley type flowers in mid june. I brought it at a school fair! 4-5 years ago and its been very well behaved and looks lovely.

I'm sorry but I don't see a picture. Could it possibly be Crambe cordifolia?

Thanks Flowerchild technical hitch. 

Its not Crambe as I have that as well I will try and put the picture on again

Not sure from the picture but could be Jacobs ladder?????

I think it is Angelica archangelica, Garden Angelica.

I can see where you are coming from but the leaves are finer than angelica and the plant is bigger than Javcobs Ladder (polemonium?).

I will wait for it to flower in a few weeks time and post again.

Ok Sallysgarden, we'll keep an eye out for it. BTW, would it be possible to enlarge the picture. That could make it clearer to us.

Might you find it in this website?

http://karisgarden.co.uk/?page_id=22

Thanks Figrat, you have helped me remember the name of a plant we bought many years ago and lost the label.

Molopospermum peloponnesiacum. Mouthful ain't it?

looks like you've got yourself Achillea grandiflora there. It's a big old plant so make sure it's not growing too close to anything you treasure. It will muscle them out of the way. Fab though.

Thanks to all of you for all your guess work. I had the lucky chance to be at an event where Roy Lancaster was and staright away he identified it as Valerian officinalis. Nothing like the valerian Ive seen poking out of walls in Cornwall!

Looks like Valeriana officinalis to me. That stuff poking out of walls is Centranthus rubra. Both commonly called valerian, that's why I like proper names