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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 »

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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 »

www.reference.com Science Biology Botany

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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The growth rate of oak trees varies depending on the species. Oak trees may be classified as deciduous or evergreen trees and grow at very slow or quite rapid paces. Some oak trees take nearly a century to reach their fu... More »

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To identify oak trees using leaves, examine the leaf branching on the corresponding tree, determine if the leaf is simple or compound, and look for lobes on the leaf's edge. Also, check to see whether the lobes are point... More »

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Acorns, the seeds of oak trees, fall off their parent trees when they mature, which typically occurs between September and early November in the United States. The exact time of maturation varies slightly with different ... More »

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Sawtooth oak trees originated in eastern Asia. They are large trees, attaining heights between 40 and 60 feet. Sawtooth oaks produce an abundance of acorns and are slow to lose their leaves in the winter. More »

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