The Collaborative International Dictionary of English v.0.48:

morel \mor"el\, n. [See morelle.] (Bot.)
   1. Nightshade; -- so called from its blackish purple berries.
      [Written also morelle.]
      [1913 Webster]

   2. A kind of cherry. See Morello.
      [1913 Webster]

   Great morel, the deadly nightshade.

   Petty morel, the black nightshade. See Nightshade.
      [1913 Webster]