Turks cap Lily or Lilium superbum. Turks cap lily flowers have a green star at the center, which makes a good identifying mark for this plant. The green star will distinguish Turks cap lily from tiger lily Lilium trigrinum, a plant from Asia that sometimes escapes from gardens. Prefers wet meadow and woods where it grows 3 to 7 feet tall and prefers full sun. These orange blossoms are 2 1/2 inches across are in full bloom from July to September. Zones 3 to 9.