Help with ID please.

But where are the yellow flowers?
But what about the tiny round headed flower /seedpods as seen in Kegster pic?
I can see at least 9

 

Throwing my tuppence into the mix, How about Potentilla recta?

 

Leaves very wrong.

Potentilla recta - Google Search

 

Did he say it is supposed to have a yellow flower? Just looked about outside and all the silverweed I found has not flowered yet. Found one flower bud on one and it does look different to the round heads in the photo which I did not pay much attention to. The sepals were more pronounced on the silverweed flower bud so you are probably right in it being something else.