Lousewort? It sounds like something you should attack with disinfectant. What an ugly name for something so beautiful. Let’s take it apart. “Wort” has nothing to do with its unfortunate homonym “wart” (or at least it didn’t until J.K. Rowling turned hogwort into Hogwarts). It’s simply an Old English word for a plant, and it shows up in many flower names, for example, coralwort, honeywort, lilywort, none of which sound particularly menacing. It’s the “louse” part that can’t be elevated by etymology; it really refers to lice. People used to think that the plant was infested with vermin and that animals grazing on it would also become infested.
We have a few louseworts in the Canadian Rockies, and although they are pretty, they are not spectacular. To see the full glory of the lousewort, you have to go to the Arctic.