I wonder how much soil is under that rock? I’m guessing, not much. And I’m not showing it in this photo, but there was snow clinging to the rocks just southeast of where I was standing. In July. This common willowherb (Epilobium ciliatum), a close relative of the (ahem!) even more common fireweed (Chamerion angustifolium*, also known as rosebay willowherb), is a mountain plant with heaps of beauty AND brawn.
*In another case of Nomenclature Gone Wild, fireweed was previously known as Epilobium angustifolium. I can’t yet find an explanation as to why the genus name was changed for this plant and not for common willowherb…but I’ll keep digging.