Resident-lawnmower-man brought this back from an evening of canoeing a week and a half ago. No animals seem interested in it (I let the dog have a good sniff, just for a second opinion).It has a unique but not revolting smell. RLM thought it would be a good challenge of my identification skills.
I wondered if it is ratroot (sweetflag, Acorus calamus), but it seems far too large!
What do you think?