kentuckiense
Debaser
This definitely is a Piperia, looks like it could be candida. Only problem, the only Piperia listed for Wyoming is unalascensis, and it is definitely not unalascensis.
The plant photographed by Charles isn't a Piperia. It is Platanthera dilatata, probably var. dilatata. It's a confusing complex of varieties, but the plant pictured is most definitely in it.
Edit: after a bit of investigating, it looks like Platanthera dilatata is now Piperia dilatata. We're both partially correct!