Published February 01, 2013, 12:00 AM
Mike Heim of Hayward, Wis., shows off a witch's broom
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Mike Heim of Hayward, Wis., shows off a witch's broom collected on Saturday, Jan. 12, 2013, in the woods north of Duluth, Minn. The brooms are genetic mutations in which the needles only grow at 1/10 to 1/20 the rate of growth of the trees they come from. (AP Photo/Minnesota Public Radio, Dan Kraker)
Read the article: Plant fanatics chase prized witch's broom
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