henbane

from WordNet (r) 3.0 (2006)

henbane
    n 1: poisonous fetid Old World herb having sticky hairy leaves
         and yellow-brown flowers; yields hyoscyamine and
         scopolamine [syn: {henbane}, {black henbane}, {stinking
         nightshade}, {Hyoscyamus niger}]

from The Collaborative International Dictionary of English v.0.48

Henbane \Hen"bane`\, n. [Hen + bane.] (Bot.)
   A plant of the genus {Hyoscyamus} ({Hyoscyamus niger}). All
   parts of the plant are poisonous, and the leaves are used for
   the same purposes as belladonna. It is poisonous to domestic
   fowls; whence the name. Called also, {stinking nightshade},
   from the fetid odor of the plant. See {Hyoscyamus}.
   [1913 Webster]