These are not links to invasive species per say, but can be helpful for looking up plants. You can lookup a plant in the plants database of the USDA or BONAP (Biota of North America Program) to see a map of where it is considered native or introduced to the wild in the US. Keep in mind the varying definitions of what is really "native" too. I've heard the BONAP one is better, but the site is a little confusing to navigate. I find it easier to just Google a plant name along with the keyword "bonap" to find the map.
BONAP
http://www.bonap.org
USDA site
https://plants.usda.gov/java/
You can see that there are some spireas that are native if you like them and would prefer a native.
http://bonap.net/NAPA/TaxonMap...
Color key to maps.
http://www.bonap.org/MapKey.ht...
Here's the one for the butterfly bushes. I think all the garden varieties are Buddleja davidii. So I think blue is introduced and shows where it has been documented in the wild and pink is where it is considered invasive. That map is from 2014 though. Seems like there should be a lot more blue in the south at least?
http://bonap.net/MapGallery/Co...
