Clandestine vandals armed with chain saws and handsaws have recently been carving burls from trees in Franklin Park, the Riverway, and the Jamaicaway, in what could signal a burgeoning underground market for the valuable trunk knots. Burls are round trunk bulges that appear when a tree is injured or diseased. They are rare and highly prized by furniture makers, woodturners, and artists for their intricate grain patterns and figure.
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