Well don’t take my word for it! I should read more about it…
Discussion
Not seeing edible.
It seems traditionally used dried to perfume the house/keep flies mosquitoes away.
One source (Wikipedia) claims it was widely used by the Salish as a treatment for tuberculosis. And one Lummi says people used to mash the whole plant to use as an emetic.
Looks like the story was wrong. Or else a practical joke to get me to drink an emetic. Which is exactly the kind of thing that old man would have done 😆