Typically around 10 feet tall, the plant has serrated, lobed leaves and long, thick, hairy stems that are spotted with reddish-purple patches. Giant hogweed usually flowers in mid-June.

Giant hogweed was named after Hercules -- a mythological ... Another tell-tale sign is that its hollow stems are smattered in ...

Green stems are splotched with purple and have coarse white hairs, which carry the plant's dangerous sap. Giant hogweed also produces thousands of dry, flat, oval seeds, which are about 3/8 of an ...