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Pictured is a black spruce attacked by the dwarf mistletoe, <I>Arceuthobium pusillum</I>. This caused witches' brooms, which is the excessive branching at any point on a limb.

Black Spruce Attacked by Dwarf Mistletoe

Pictured is a black spruce attacked by the dwarf mistletoe, Arceuthobium pusillum. This caused witches'…