Source : Webster's Revised Unabridged Dictionary (1913)

Apocryphal \A*poc"ry*phal\, a.
   1. Pertaining to the Apocrypha.

   2. Not canonical. Hence: Of doubtful authority; equivocal;
      mythic; fictitious; spurious; false.

            The passages . . . are, however, in part from
            apocryphal or fictitious works.       --Sir G. C.
                                                  Lewis.

Source : WordNet®

apocryphal
     adj 1: of questionable authenticity
     2: of or belonging to the Apocrypha