If there's one Missouri wildflower that says spring to me, it's wild columbines.
I first came close to columbines on a Colorado vacation to Estes Park. Hummingbirds were all over the flowers so I decided I needed to buy seeds and grow columbines in my garden.
A few years later, after several unsuccessful attempts to raise columbines by seed, a friend gave me a start of Missouri's wildflower version. These lovely red flowers with yellow accents look almost ethereal in early morning sunshine.