What's this flower (Answered)

Thanks Margaret W.

I think you are going for three in a row of stumping them...

Margaret's flower is yarrow.

Flo H.

Hi Marston,
This is a wild flower. Smells strong.
The name of this flower is called "TANSY". Ancient times it was used
to ward off flies and hung around doorways and windows. I tried it once
without significant effects. Maybe our flies today are different!
Marg.

Thanks Margaret W.

I'll see if I can find one in my friends garden that might be a challenge..