I actually discovered these sundews here last year. In a fit of Drosera rapture, it took me a few minutes to notice what was growing with them - the odd-looking lime-green fern trailing about the upper part of the photo. It turned out to be Northern Appressed Clubmoss, Lycopodiella subappressa. This was only the second or third site so far recorded for this endangered species, which has an extremely limited range.
This day, I was on my hands and knees photographing these micro-rarities, and noticed this sedge. This thing is truly tiny; one plant could sit comfortably on a nickel. It's the aptly named Dwarf Bulrush, Lipocarpha micrantha. Threatened in Ohio, it is a notorious seed banker. That is, the plants will sit dormant as seeds in the soil for long periods, awaiting the proper conditions to appear and induce germination. I didn't see it here last year.