Butterfly Blue Pincushion Flower features unusual blue pincushion flowers at the ends of the stems from late spring to early fall. The flowers are excellent for cutting. Its deeply cut ferny leaves remain grayish green in color throughout the season. The fruit is not ornamentally significant. Butterfly Blue Pincushion Flower is an herbaceous perennial with tall flower stalks held atop a low mound of foliage. It brings an extremely fine and delicate texture to the garden composition and should be used to full effect.