Amsonia

This distinctive, clump-forming species is known for the long, very slender leaves which grow in whorls around the stem. The shiny leaves are dark green in summer and change first to bright yellow, then to golden brown in autumn. Clusters 2-3" across of periwinkle-blue flowers across bloom in late spring and early summer. Once established in moist, well-drained soil, thread-leaf bluestar is tough, drought-tolerant, and long-lived.

A long-lived species with upright stems and willow-like foliage. Terminal clusters of small, light blue, star-shaped flowers appear in early summer. Prefers moist soil and light shade but is quite adaptable.