I've been fighting lesser celandine (AKA Ficaria verna, Ranunculus ficaria) in my yard and garden for some years now. This plant is a homeowner's nightmare-- it looks very pretty at first but it takes over everywhere, it's nearly impossible to dig out, and extremely hard to kill even with glyphosate. But this product works! You have to follow the directions and apply it at a heavy rate on this particular weed, but it seems to be doing the trick. Maybe I can get my lawn back!!