This post illustrates a couple of dozen, common species of spring wildflowers in Ohio. The scientific name in each caption links to an article where you can learn more about that species (a Wikipedia article, if possible). It also lists the months in which you can expect to see each species bloom in central Ohio. In southern Ohio they will bloom a little earlier and in northern Ohio a little later.
The original inspiration for this post was a handout on what spring wildflowers can be seen at different locations along the boardwalk in the Inniswood Metro Garden in Franklin County, Ohio. The locations are identified relative to numbered posts along the trail. Since most of these flowers are perennials, the same flowers can be seen year after year near the same place. I have preserved the information on post location that is specific to this Metro Park; if you are trying to identify wildflowers elsewhere, you can disregard the numbered posts.
A few placeholders remain for species that I hope to photograph later this year.
Between Posts 3 and 4