I know what you mean there. The one closest to me (12mi) in Springfield is really, really small (conservatory is like 50' diameter), but at least they got one. It seems to have the same plants. We go up to Davenport/Quad Cities most years to attend a 3 day blues fest and always visit the botanical gardens in Davenport and Rock Island. The Davenport one specializes in Hostas while Quad Cities has rare and unusual trees. We also frequent MOBOT (Missouri Botanical Gardens) in St Louis; now there's a world class botanical Garden!