Thalictrum Rochebrunianum

Native to Japan, this slender, clump-forming perennial has lacy, fine-textured, bluish-green, columbine-like foliage. Sprays of pendulous, lavender-purple flowers with contrasting yellow stamens appear in late summer in loose, airy clusters, on sturdy, purple flower stems which rise well above the foliage, sometimes up to 8 feet tall and typically do not require staking. When massed, the overall effect of this bloom can be spectacular.