Tucson Arizona weedy composite

This is a weedy composite next to the road.

Small Yellow Rays are present
Pappus of capillary bristles
Plant herbaceous

 

Hard to tell. Maybe a Chrysothamnus

 

Are those rays, indeed? If so, it should not be Chrysothamnus. The closest to it with ray florets is Chrysoma.
http://efloras.org/florataxon.aspx?flora_id=1&taxon_id=107019
http://efloras.org/florataxon.aspx?flora_id=1&taxon_id=106996

Also the two pictures look somehow different. Do they belong to same species?

 

Thanks. I went back to the flower I collected and looked at the pappus closer. It wasn't as I described it above. It was of hyaline paleae -- lanceolate. The costa is prolonged into an awn which made me think of capillary bristles. The clincher is that the achenes are obpyramidal.

The plant is a common plant as I suspected: Hymenothrix Wislizeni.