Source : Webster's Revised Unabridged Dictionary (1913)

Bunchberry \Bunch"ber`ry\, n. (Bot.)
   The dwarf cornel ({Cornus Canadensis}), which bears a dense
   cluster of bright red, edible berries.

Source : WordNet®

Cornus canadensis
     n : creeping red-berried perennial herb distinguished by
         clustered leaf whorls at tips of shoots; Greenland to
         Alaska [syn: {bunchberry}, {dwarf cornel}, {crackerberry},
          {pudding berry}]