Poison ivy has three leaves, and the middle leaf has a longer stem.

Touching poison ivy causes an allergic reaction due to urushiol oil.

Poison oak and poison sumac are related to poison ivy and also cause rashes.

Michigan's summer climate provides ideal growing conditions for many flowers and other plants we enjoy — and for a few poisonous , three-leafed plants we all could do without.

In Michigan, two types of poison ivy spread throughout yards and forests: eastern poison ivy, which grows throughout the Lower Peninsula, and western poison ivy, which grows mostly in northern areas, including the Upper Peninsula, according to Michigan State University's Extension.

Though the common phrase: "leaves of three, let it be” is catchy enough to recall poison ivy's appearance, there

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