Seeds Aristolochiaceae Elegans or Calico flower play an important role in the life of native Pipevine Swallowtail butterfly. Grows up to 20 feet, is hardy in zones 8a-10b. The very unusual green/maroon modeled blossom is an attention getter and form every 4 to 6 inches along the stem when it reaches about 6′ – 8′.