Elle, since you live in Wyoming I believe it is the same species we have here in Montana. Plantago patagonica or woolly plantain. Which is the same species Tyler sent the link for. It is a
native annual. It can be very small in bad years for it and go unnoticed. I suspect it's just having a very good year.
Western Montana gardener and botanist in zone 6a according to 2012 zone update.
Gardening on lakebed sediments with 7 inch silty clay loam topsoil, 7 inch clay accumulation layer underneath, have added sand in places.