The National Wildlife Federation says that a native plant "...has occurred naturally in a particular region, ecosystem, or habitat without human introduction."

Given that, the article may have problems because some of that stuff is not native. For my region (my property abuts a wildlife refuge, a national forest, and an Indian reservation), many 'native' plant species are illegal or are disallowed by insurance policies within 5m to 50m of a building.

Climates have changed and appear to be rapidly changing. So the affected ecosystems will change. And does the re-introduction of a plant species that is no longer found at large, constitute a non-native species introduction? Is the synthetic preservation and cultivation of a native plant species that is no longer suitable for a changing ecosystem constitute an unnatural and thus non-native species?

And what about plants that pop up from germinated seed (probably transported by birds and wind) that are not native to this area but thrive because I have altered the habitat? [additions and changes from pond and drainage control and fencing projects]