Hyoscyamus niger

Possibly engraved by W. B. Annin or Annin and Smith from a drawing by Jacob Bigelow(?).Colored engraving of Hyoscyamus niger or Henbane (Figure 1) with "Corolla laid open" (Figure 2), "Calyx" (Figure 3), and "Calyx of the fruit laid open to show the capsule within it" (Figure 4)