ironweed
one of Missouri’s several types of goldenrod
golden aster
goldenrod
American bellflower
Here are a few plants still blooming and getting ready to bloom at the garden.
Draught doesn’t get it all.
Native Plants in Urban Places, Capen Park, Columbia, Missouri
Capen Park Native Plant and Rain Garden, maintained by Missouri Master Naturalist Program
Native Plants in Urban Places, Capen Park, Columbia, Missouri 
From the top you have some kind of goldenrod, golden aster, American bellflower and ironweed.