My local nursery hasn't got a clue... What is this?

Dear All,
I have found this plant growing in my blueberry tub. Somehow I did not realise that it is not another blueberry shoot until it has grown above it.
It is 1 year old seedling that I first noted last summer and now in the second summer it is this large.

Any clues as to what this is, as my local garden centre pros have suggested a dogwood or a beech... Somehow pictures of those plants do not look quite the same...

http://tinyurl.com/86eudrc
http://tinyurl.com/7od5ow5

 

Certainly looks like Cornus to me.

 

I agree Cornus

 

No it is a willow.Salix caprea

 

Shouldn't dogwood be a bush?
This one looks like a tree.
Also, everything I find on dogwood seems to have leaves in pairs and this one has alternating leaves.

 

Leave do not quite look the same for Salix Caprea.

 

Found it!!!
Bird-cherry tree

Exact match to leaves and branches.

 

hmm. Dogwood is also right but it is Black Dogwood.
Prunus padus

 

I come down on the side of Salix

 

It is a willow, as above, I get them everywhere living on the river bank.

 

Dmitriy, I am not sure exactly what your young tree is.

Cornus almost always have leaves on a twig that are opposite to each other.
( Cornus alternifolia being an exception!)

Salix on the other hand has leaves that are alternate on the twig.

Prunus padus, common name Bird cherry has alternate leaves.
But the leaves of this have different edges, leaf margins from your pic. see..

http://www.floralimages.co.uk/page.php?taxon=prunus_padus,4

So this very neatly rules out Dogwood. Including black dogwood ... Cornus sanguinea.
Cornus can be shrubs or grow in to sizeable trees depending on which sp they are.

Hope this helps a little.

This link may help you.

http://www.mappler.info/geo005info/wp-content/uploads/2012/03/opposite_alternate.gif

 

Looks more Salix family than Cornus to me

 

I would also go with Salix family.
Dave