The Collaborative International Dictionary of English v.0.48:

Bunchberry \Bunch"ber`ry\, n. (Bot.)
   The dwarf cornel (Cornus Canadensis), which bears a dense
   cluster of bright red, edible berries.
   [1913 Webster]

WordNet (r) 3.0 (2006):

bunchberry
    n 1: creeping perennial herb distinguished by red berries and
         clustered leaf whorls at the tips of shoots; Greenland to
         Alaska [syn: bunchberry, dwarf cornel, crackerberry,
         pudding berry, Cornus canadensis]