Thalictrum clavatum

Thalictrum clavatum DC., also known by its common name “Mountain Meadow Rue” or “Lady Rue,” is a slender perennial forb of the Ranunculaceae (buttercup) family native to the South and Central Appalachian regions of the United States, namely the states of Virginia, Kentucky, Tennessee and parts of North Carolina and West Virginia. The plant species is commonly found within seepages, moist forests, spray cliffs at waterfalls, and brookbanks at elevations of 500 meters in mountainous areas. It is distinctive due to its light green roughly 1.5 feet tall shape and loose pinnacle of white flowers that bloom within the months of May to July....read more on Wikipedia.