http://www.bluestemprairie.com/
Bookmark it if you have not done so already (Microsoft Internet Explorer calls them "favorites" while everyone else calls them bookmarks).
_________UPDATE_________
Apologies for an error. I read the site, I never noticed I was misreading the titie.
Someone who is a tree-hugger [actually meant in a positive sense, an environmentally aware person] pointed out that there is a nature preserve named "Bluestem Prairie SNA," etc. - in Clay County, Northwestern Minnesota.
There is a Bluestem tallgrass, etc. I erred.