PlantFiles: Yellow False Acacia, Black Locust, Yellow Locust
Robinia pseudoacacia 'Lace Lady'

I do not believe this is the invasive one the previous poster mentioned. This is quite a smaller version and I believe that it is sterile. I have not had any suckers as of yet, I see that someone that posted pictures has. I love it so far, and I have had it over a year. I had it in a pot as a house plant for about 9 months and it is now in it's permanent residence in my yard. Bugs seem to like it very much however, and you do have to prune quite often to keep it's shape. It may be a good tree for bonsai.

I have not had it flower yet, but it is small and I did keep it as a houseplant for a stretch as I mentioned before. I will update with any pertinent information.

Black locust (Robinia pseudoacacia) is considered invasive by the Minnesota DNR
"Ecological Threat:

* Invades primarily disturbed habitats, degraded wood, thickets and old fields crowding out native vegetation of prairies, oak savannas and upland forests, forming single species stands.
* It reproduces vigorously by root suckering and stump sprouting forming a common connecting root system.
* It is native to the U.S. and occurs naturally on the lower Appalachian mountain slopes. It has been extensively planted for its nitrogen-fixing qualities and its hard wood."