Ch[ae]rophyllum temulum

from The Collaborative International Dictionary of English v.0.48

Cow parsley \Cow" pars`ley\ (kou` p?rs`l?). (Bot.)
   An umbelliferous plant of the genus {Ch[ae]rophyllum}
   ({Ch[ae]rophyllum temulum} and {Ch[ae]rophyllum sylvestre}).
   [1913 Webster]