I know, Asteraceae is difficult. But may be some unusual features of this flower will click in somebody's memory. What I see special here are hemispheric form of the receptacle, almost flat involucre and entire leaves. I could not find this combination in my list. No pappus info. It did not occur to me at the time of shooting that I need to trash a flower to figure out what is it.
The leaf shape and general flower construction seem to me to point towards Erigeron. Perhaps E. speciosus?
Thanks, lorax! The description of Erigeron speciosus leaves matches indeed. However, the flowers are somehow different: the upper surface is usually flat and the bottom is more cuplike. The rays are narrower and normally light-purple. Here is a good representation with close-views: http://montana.plant-life.org/species/erigeron_specio.htm And I also have Erigeron speciosus in my collection:
See, I thought it might be a little too white; my Audobon field guide has E. speciosa listed under the white flowers. However, if the leaves match then you're at least in the right genus.
Probably, not: Boltonia is not found in Utah and available pictures do not show so much hair as in my plant. Thanks, Steve!
