Watch Out for Dangerous Invasive Plant on Trails this Season

Giant hogweed, found in at least 12 states, causes painful blisters and blindness.
By Backpacker Contributors ,

Giant hogweed: Steer clear.

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Be on the alert for giant hogweed this year, officials in multiple states warn: The 14-foot-tall, invasive plant's sap can cause painful blisters, scarring, and blindness if it gets in the eye. Best line of defense: Don't touch it. Giant hogweed has been found in New York, Washington, Massachusetts, New Hampshire, Maine, and at least seven other states.

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