"It's a weed."
A weed is merely a plant out of place.
An invasive plant (which, as, as Mudbug points out, includes all the mints) is only a weed if it's growing uncontrolled where you don't want it to be.
By the same token, most of our favorite herbs could be called weeds, because they grow wild and uncontained all over the Mediterainian basin. |