Those common names are a real pain sometimes. Aces, I like knowing the local plants too, but asking some locals gets frustrating when they call something it isn't.
I can sorta see the false hellebore/skunk cabbage confusion, but like you, not the mules ears.
I have a friend who calls prickly lettuce "thistle". I try to correct him, but I've given up. Not sure, might just be what folks around here have always called it, as it's a bit spiny like a thistle.
At least around here a creek is a creek, and not some other funky name.
Geno