Ptelea trifoliata, or Wafer Ash, is a small, multi-stemmed tree with a thin, crooked trunk. Wafer Ash’s flowers are green-white in color, growing in clusters for a short 2-week bloom period in May. The perennial is a host for the Giant Swallowtail caterpillar. After blooming, the tree produces wafer-like samara, a one-seeded winged fruit. The fruit has been used as a substitute for hops in beer and its root bark for home remedies.