This spectacular form (or possible hybrid) of our native I. virginica has been one of our favorites, and we finally have enough to share. The base of the wide green foliage is bright purple...especially so in spring. Rising out of the green foliage in spring is a black purple bloom scape to 24" topped with blue purple flowers, typical of I. virginica. I. 'Gerald Darby' is great for those that like to design with colors like dark purple...ooh baby!