Solved Campanula id please

I was given a division of white Campanula, apparently called "Moonbeam" or "whitebeam" or something like that.

Can anyone identify it please? Google doesn't find a match.

The plants are now about 30-40cm tall. (Photo is of the mother plants that are a tad invasive, the gardener told my daughter. )

Thanks!

 

It looks like my Campanula lactiflora. Mine is called 'Pritchard's Variety' but it's difficult to tell if this is the same without the flowers.

 

Campanula glomerata Alba perhaps ? Leaves might not be correct though .

 

Thanks!

It looks quite big and strong. I'm secretly hoping for lactiflora, but any variant is fine.

Eventually I'll find out but in the meantime I'd like to plan where it goes.

 

My lactiflora is well behaved and stays where I planted it, but I gave a piece to a lady a few houses down the road, and she told me it went rampant in her garden.

 

I have lactiflora. It popped up a few years ago, it’s gently self seeding around but only the odd one here and there. If it did turn out to be invasive nipping off the spent flower stems would easily keep it under control.

 

I really struggle to id Campanula...even in flower.
Something I must get to grips with.

Campanula lactiflora alba.
According to RHS is taller at 1.2 m

Campanula lactiflora 'Alba' | milky bellflower 'Alba' Herbaceous Perennial/RHS
.................................................

Campanula glomerata var Alba.
According to RHS is shorter at 50cm.
I guess the clue is in the common name "clustered bell flower."...as it has dense terminal racemes
Campanula glomerata var. alba | white clustered bellflower Herbaceous Perennial/RHS

 

Have just checked and I think the one I was thinking about is glomerata but I also think I might have lactifolia as well and the same comments apply

I obviously,y need to brush up my Campanula ID skills as well @Silver surfer

 

It looks like Lactiflora to me. I bought Pritchards variety ( pale bluey mauve) some years back. It self seeds a fair amount but some of the seedlings are not true to the parent and flower a sort of creamy colour. Still nice so not a big issue.