My wife and I spent the weekend in northern Arizona. There is some type of yellow flower (maybe Camphorweed?) that is going crazy in selected fields. I took these photos of this spectacular natural wonder:
No, these look like little daisies.
Hard to be sure without a closer look, but I’d say they were Black-eyed Susans.
There are loads of Black-eyed Susans growing up there, too, but these are smaller, and have yellow seeds. I’ll post a closer photo of the flowers.
OK, I’ve used up all my free download bandwidth, so I moved the images.
https://www.flickr.com/photos/11822576@N08/51437622200/in/dateposted-public/
Closeup of the flowers:
These are Black-eyed Susans, in front of the KMC in Williams
Sure look like black-eyed susans to me: black-eyed susan - Google Search
The huge masses in the fields don’t have black eyes - they have yellow eyes.
Maybe Brittlebush.
Scroll down to the first large picture.
The flowers are very similar, but I don’t think that’s it - I have a bunch of volunteer Brittlebush growing at our house in Scottsdale, and the structure of the plant is very different. But, maybe these are all very young plants, before they get “bushy.”
Maybe they are tickseed (Coreopsis).
This guy thinks they are:
Okay, they’re yellow-eyed susans then.
And coreopsis is a disease that can set in during a complicated surgery gone bad, as used in The Secret Life of Walter Mitty by James Thurber.
I can’t be 100% certain with one “sort of” close up, but yes, I believe it’s coreopsis.
At first, I thought they were coreopsis, but I think they are brittlebush (encelia farinosa).
I thought of brittlebush because there is a noticeable lack of foliage in the OP’s examples, although I agree the ones in the pictures are not mounding or bush-like.
I have coreopsis in my side yard and it is always full of leaves.