Early Meadow Rue or Quicksilver-weed
Petal-less flowers have yellow stamens that hang like small tassels. The female tassel-like blossoms are purple and appear on separate plants.
This flower blooms in the spring, just as the trees are leafing out, which accounts for its common name. The species name alludes to the fact that the male and female flowers are on separate plants, and is derived from the Greek word meaning "two households."