Source : Webster's Revised Unabridged Dictionary (1913)

Jacobaean lily \Jac`o*b[ae]"an lil"y\ [See {Jacobean}.] (Bot.)
   A bulbous plant ({Amaryllis, or Sprekelia, formosissima})
   from Mexico. It bears a single, large, deep, red, lilylike
   flower. [Written also {Jacobean}.]