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.
How do they get the deer to cross at the signs? Or to read this tiny ad?
100 ways to cut one's personal carbon footprint - in order of tons of carbon