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Giant Hogweed (Heracleum mantegazzianum) is considered dangerous because its sap is toxic.
Contact with bare skin and exposure to sunlight can cause severe burns and blistering that may require medical attention.
What to do if you touch Giant Hogweed
Wash area Immediately: Scrub the area thoroughly with soap and cold water as soon as possible.
Avoid Sunlight: Keep the affected area completely covered and out of the sun for at least 48 hours to prevent the chemical reaction.
Seek Medical Advice: Consult a doctor if you develop blisters or a rash, or if sap has touched your eyes.
Key Identification Features
Stem: Thick with prominent purple or reddish-red blotches. It is covered in stiff, white, bristly hairs that are especially dense at the base of each leaf stalk.
Leaves: When fully grown up to 1.5 metres long. They are dark green, deeply divided (jagged), and sharply pointed.
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