The purple berry-like growths that appear in oak trees aren't berries at all. They're oak galls, which the tree develops in response to being infested by certain kinds of small wasps. More »

One kind of plant that has purple berries is the pokeweed. This weed can be found growing along roadsides, in clearings and in open woods from Canada down to New England, south to Florida and west to Texas and Mexico. More »

Berries with a dark purple color include acai berries and purple chokeberries. Boysenberries, Indian plums, huckleberries and elderberries are other berries with a dark purple color. More »

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