Wildflower or Weed?

I'm not sure exactly what type plant this is but there is one big spider on it.

[Allison Maltese]

It looks like a kind of yarrow to me. That is one big spider! Nice spotting it.

[Joan Robillard]

Lovely

[Kerry McCarthy]

Lovely shot of the flowers, and that is a big spider!

[mittens (Marilyn)]

So pretty looking.

[haskar]

There are Common Yarrow. Lovely shot.