Thalictrum polygamum or Thalictrum pubescens is also known as Tall Meadow Rue, Shining Grass, Musquash Weed, Quicksilver Weed, King of the Meadow, Rattlesnake bite, or Muskrat Weed. It is part of the Ranunculaceae or Buttercup family of plants. It is native to eastern North America.
Thalictrum polygamum is a clump-forming herbaceous perennial. It grows in swamps, streamsides, and wetlands. It grows to about 2.5m or 8ft.
It has three-lobed leaflets that are subdivided, odd or even pinnate, and roundish. Thalictrum polygamum flowers in the summer from July to September and flowers don’t have any petals. The creamy white flowers appear in panicles, but they are actually threads of stamens and no petals. It attracts butterflies and bees.
Grow it in the sun or partial shade. Plant it in moist and well-drained soil. Propagate from seed. Thalictrum polygamum does self-seed but not extensively. Seeds sometimes don’t germinate for a year.