An Erodium. Perhaps Erodium cicutarium, a common introduced weed in the USA. The top picture also contains Lamium amplexicaule, Henbit, mixed in with the Erodium. And is that a cool fossil bottom right of the top pic?

Thank you, floral. Now I know what it is: common stork's bill. And, yes, it appears there is some sort of plant fossil in that piece of limestone. I didn't notice it until I looked at the photo later.