Hmmmm Dunn ranch (~ 5,000 acres - nearly 1,000 never plowed) is near Hatfield MO in Harrison county. Very much a prairie. One of if not the largest prairies in Missouri. When you see it, you say WOW - Prairie. Especially when the 120 Bison are roaming.
Barton has some prairie
St. Clair is in the Ozark mountains ... wth?
Pettis is not what I would call prairie. Rolling farmland - heavily farmed