What is "vaccinium uliginosum"

Bilberry \Bil"ber*ry\, n.; pl. Bilberries. [Cf. Dan. b["o]lleb[ae]r bilberry, where b["o]lle is perh. akin to E. ball.]

1. (Bot.) The European whortleberry ( Vaccinium myrtillus); also, its edible bluish black fruit.

   There pinch the maids as blue as bilberry.
   --Shak.

2. (Bot.) Any similar plant or its fruit; esp., in America, the species Vaccinium myrtilloides, Vaccinium c[ae]spitosum and Vaccinium uliginosum.

Vaccinium uliginosum (bog bilberry, bog blueberry, northern bilberry or western blueberry) is a Eurasian and North American flowering plant in the genus Vaccinium within the heath family.