There are several species of cranberries that can be harvested:
V. oxycoccos, Northern Cranberry. holarctic in distribution (N. Am., N. Europe, N. Asia). Berry small, pale pink.
V. microcarpum, Asia and Europe, small, related to the above.
V. macrocarpum, northeastern N. Am. from Canada to S. Carolina; larger, apple-like taste.
(Some more southerly cranberries, not important commercially).
The 'bush cranberry' is not closely related and has almost no commercial value.

In British Columbia and Washington, the V. macrocarpum was brought in in 1872 and is an important crop.