hyoscyamus(n = noun.plant) genus hyoscyamus - genus of poisonous herbs: henbane;
is a kind of asterid dicot genus
is a member of family solanaceae, potato family, solanaceae

1.  A genus of poisonous plants of the Nightshade family; henbane. [1913 Webster]

2.  The leaves of the black henbane (Hyoscyamus niger), used in neuralgic and pectorial troubles. [1913 Webster]

genus hyoscyamus, hyoscyamus muticus, hyoscyamus niger