The Collaborative International Dictionary of English v.0.48:

Huckleberry \Huc"kle*ber`ry\, n. [Cf. Whortleberry.] (Bot.)
   (a) The edible black or dark blue fruit of several species of
       the American genus Gaylussacia, shrubs nearly related
       to the blueberries (Vaccinium), and formerly confused
       with them. The commonest huckelberry comes from
       Gaylussacia resinosa.
   (b) The shrub that bears the berries. Called also
       whortleberry.
       [1913 Webster]

   Squaw huckleberry. See Deeberry.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Deerberry \Deer"ber`ry\, n. (Bot.)
   A shrub of the blueberry group (Vaccinium stamineum); also,
   its bitter, greenish white berry; -- called also squaw
   huckleberry.
   [1913 Webster]

WordNet (r) 3.0 (2006):

squaw huckleberry
    n 1: small branching blueberry common in marshy areas of the
         eastern United States having greenish or yellowish
         unpalatable berries reputedly eaten by deer [syn:
         deerberry, squaw huckleberry, Vaccinium stamineum]