I'm not familiar with the distribution of each species, but I'm sure there is a lot of overlap between NW Arkansas & MO. If you see any species that you really question, bonap.org provides good range maps. Any easy way to use it is to enter the genus name (Packera, for example) and "bonap" into a search engine. This will lead you to the bonap range maps for every species in that genus that occurs in North America. Scroll through until you find the species you're looking for, and you'll see where it has been recorded down to the county level.