Leafy Invasive Plant

The plant to the right of the Buddleia...
It's approx 12-18" high.
It appears to spread by runners along the ground and has some fairly chunky (1/2"+) roots that are pink/coral in colour.
It's pretty invasive and was (before I took to it today) covering approx 10' of flower bed, smothering roses and starting to set it's runners into the lawn also.

 

That looks like Geranium Macrorrhizum.

 

Thank you very much =)

 

Geranium yes, macrorrhizum no. More likely maybe G endressii but there are a number of others it could be.

 

The clue's in the root description.

 

I thought it might be Alchemilla mollis

 

I was looking at the Buddleja next to it, and thinking; "now which one is more invasive here?"

The other one is Geranium though.

 

My vote goes to Geranium.

 

Mine goes to geranium too. If it were my garden it would be the buddleia that came out!

 

Used to love Buddleia because it attracted butterflies but this year it seems to be taking over the world - or at least every hedgerow or scrap of waste ground and I can't remember when I last saw a butterfly. What's going on, is it about the rain or the lack of sun or both?

Come to that, don't know what's happened to my geraniums this year either, seem to be all leaf and no flower.

 

Thank you all =)

The buddleja isn't staying there. Once it's finished flowering I'll be cutting it back and then moving it. We have a neighbour with a err... not-so-pretty backyard and I'll replant the buddleja along the fence line there so it will provide a visual barrier. I really won't mind if it decides to invade all along the fence line - I was half considering trying to split it into several plants to do just that.