The Giant Hogweed has white flowers with 50-150 flower rays clustered into an umbrella shape that are up to 2.5 feet across.
It can grow between 7 and 14 feet tall.
It has large, incised leaves that can grow up to 5 feet across.
The stems are green with extensive purple splotches and coarse white hairs. They are hollow, ridged and 2-4 inches in diameter.
Seeds are dry, flat, and oval. They are approximately 3/8 of an inch long with brown lines.
The burns from the sap of a Giant Hogweed appear as painful blisters within 48 hours of contact. Scars can last up to 6 years, although typically don’t last more than a month. The sap can cause blindness if it makes contact with the eyes.
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