@dalehileman,
Utricularia stygia, the arctic bladderwort or Northern bladderwort,
There you have the word stygia.
In Swedish stygg means nasty, hard, cruel.
Wonder how that would be related to Styx or if it is a independent Scandinavian word.
Besides that ... one learns new words every day. Just think about all that is used within IT, pollution, enviroment, TV, technical expressions which we did not use or even know about 20 years ago.