Thanks Dave.
I had already set up a separate category for these, but thought I'd mention the status box as well. I'd just really rather not have a plant like, say for instance, Garlic Mustard (Alliaria petiolata) in my list under any of the presently available status choices... just because I'm researching it. I don't have it, want it, nor did I used to have it, but it's rampant around here anyway.
Thanks for considering it.