Here's a closeup of the 3" flower, NOT one of the stinky ones.

Rhynchospora? Maybe a sedge? Here is a link that might be useful: You can search images here

Hi, I can't see your pics. Do you have them set correctly for the public to view them? Remy

In eastern Mass. at least, the most common plant that meets the 'daisy' archetype (Jungian perhaps? It seems like kids know how to draw them without actually seeing one) -- fairly large flower, white petals, yellow center (I apologize to the botanists cringing at my inaccurate use of these terms for composites) -- is the oxeye daisy, a non-native. The easiest way to identify it is the depression in the center of the yellow (which is lacking from the flowers in the picture from Utah). Asters and fleabanes, while they also may have white petals and yellow centers, are generally too small to fit my concept of a daisy. My field guide's description of wild chamomile is consistent with the flowers and foliage in the photo. (Oxeye daisy leaves are much wider and lobed/serrated.) Other daisy-like flowers in my guide (albeit only an eastern U.S guide) are: sneezeweed yarrow, mayweed, feverfew, and scentless chamomile, all non-natives to this area. (Sorry, too lazy to put in latin names, but they are available upon request.) -- wd