I call the cultivated varieties 'near natives' and figure, for example, if the birds like my native Mahonia berries, they will likely eat Mahonia 'Charity' berries as well. And, I agree that it is wise to first check if a plant is invasive to your area. I'm also surprised when nurseries market invasive plants - just saw some English ivy at a nursery, which is a huge problem in the PNW. One would think any plant with a 'noxious' rating would be banned from being sold. Guess not.
