Western Goldenrod" but - no.
More sadness: Google was no help. Yellow wildflowers, yellow weed flowers, golden weed flowers, ..... no hits that match. And, honestly, I just didn't want to spend any more time looking today.
Additional sadness: we've become so impatient, taking for granted the plethora of knowledge immediately available at our fingertips.
So, if you can identify , please take pity on my ignorance and leave the flower name in a Comment. (Hint: if you Comment as Anonymous or Name/URL, you don't have to jump through any sign-in hoops. And you can leave the URL of your very own blog or site & hope that someone new clicks on it!)
Update: Thanks to Andrei for identifying these (see Comment below)!
If I correctly remember, tansy is often mentioned in Victorian novels as a cure for what ails you.