I've come to realize I've misidentified the plant in these photos. It's not Romanzoffia sitchensis, as I had imagined - there is a vague resemblance to the leaf shape but the inflorescence is wrong. The plant was found among talus boulders where it was wet from snowmelt in mid-August at about 2500m elevation in Bow Valley Wildland Provincial Park, eastern slope Rockies, Alberta. The pictures are poor but I've blown them up as much as possible to show the detail. I thought it was a saxifrage, perhaps, but I can't match it up to any of those in Flora of Alberta. Does anyone recognize it? Thanks in advance.