can you identify this creeper growing in my grass?

This low growing creeper has infested one area of my grass (not paying much attention was I?) Hope somebody can identify it for me. No flowers that I have seen.
I have another area with a lot of achillea seedings and I have (gasp!) been spraying both areas with killex and it is being effectively - the infestations are slowing dying off.

 

Hard to tell for certain with it being a bit blurred, but check Creeping Buttercup (Ranunculus repens)

 

Thanks. I think that is it although I have never seen it flower. Here is a pic of the leaves,(the flat edge on one is probably a result of lawn cutting) and one from another website.

 

Looks like Creeping Buttercup to me too.

 

Thank you!

carol