picture attached. This plant was found in the mountains of Idaho above Riggins.
Drought Smart Plants reply:
Congratulations! You've found one of the very few native Sedum in North America.
Sedum integrifolium - based on the large yellow bloom, this is my first choice. It's also called Roseroot and Kings Crown, which might refer to the way the flowers are clumped at the top of the stem. It also goes by the friendlier name of Sedum rosea.
Here's what Mackinnon/Pojar/Coupe say in Plants of Northern British Columbia:
"Ecology: Alpine scree, talus, cliffs, and ridges (usually where moist in spring) sometimes also in grassy tundra or even moist turfy sites; at high elevations throughout, but more abundant on richer, less acidic bedrock types."
Does this sound like the type of situation you found this lovely plant in?
Other possible Sedum that you may find in your area are:
Sedum lanceolatum (sharper pointed foliage)
Sedum divergens (smaller and doesn't have these incredible distinctive flowers, rather lots of tiny blooms held over a colony of creeping plants)
I've never had the good fortune to see this plant in the wild, so thank you for sharing - what luck that you got to see it in full glorious bloom!