False Rue Anemone
Herbaceous spring wildflowers, often in large colonies. Flowers arising singly on long stems from leaf axils; sepals 5, white. Blooms March–May. Leaves present at base of plant but also on the stems with flowers. Leaves compound with 2 or 3 sections, these with rounded lobes.
Similar species: This flower is often confused with (true) rue anemone, Thalictrum thalictroides. That species, however, has only bracts on the flowering stems (not complete leaves); often has more than 5 sepals, which are sometimes pinkish; is usually only found singly; and prefers wooded slopes to moist bottomlands.