“No living man will see again the long-grass prairie, where a sea of prairie flowers lapped at the stirrups of the pioneer. We shall do well to find a forty here and there on which the prairie plants can be kept alive as species. There were a hundred such plants, many of exceptional beauty. Most of them are quite unknown to those who have inherited their domain.”
-Aldo Leopold-
Please here my plea in considering using plant species that were/are native to your geographic area the next time you consider a landscaping project. I have gotten a lot of pleasure from the couple of native wildflower patches I put into my yard. If you are a nature photographer or an appreciator of Nature and all her diversity, this is an excellent way to continue these passions while contributing to the conservation ethic. You may even suggest this to the companies you work for and organizations in which you are involved.
A Thousand Acres of Silphiums 
Amazing!!