The Collaborative International Dictionary of English v.0.48:

Bifarious \Bi*fa"ri*ous\, a. [L. bifarius; bis twice + fari to
   speak. Cf. Gr. ? twofold; ? twice + ? to say.]
   1. Twofold; arranged in two rows.
      [1913 Webster]

   2. (Bot.) Pointing two ways, as leaves that grow only on
      opposite sides of a branch; in two vertical rows.
      [1913 Webster]