Good Call, A.L. and M.Y.O.Q. It is Valeriana pauciflora. It is interesting to note that “pauciflora” means few-flowered, but the common name is Large-flowered Valerian. This native plant has a limited distribution in North America, but can be locally abundant where it occurs. Maps on the USDA Plants database seem to show that Indiana has more known locations than other states in the plant’s limited range. These were abundant in low, rich woods along the Salamonie River in the Kokiwanee Nature Preserve, Wabash County, Indiana.
Do you recognize this plant? Without seeing leaves, identification is much more challenging. Feel free to name it or just take a guess! It was growing in shaded, wet woods.