Heracleum mantegazzianum, commonly known as giant hogweed, [2][3][4][5] is a monocarpic perennial herbaceous plant in the carrot family Apiaceae. H. mantegazzianum is also known as cartwheel-flower, [3][4][5] giant cow parsley, [6] giant cow parsnip, [7] or hogsbane.

Researchers estimated there were 386 million nondormant seeds at the time of spring germination in the largest giant hogweed population, which occupied 1,066,900 feet² (99,121 m²) [22].

Giant Hogweed, Heracleum mantegazzianum is found sporadically throughout Maine, but is not a common plant. Giant hogweed is noteworthy because its sap causes severe skin irritation.

Giant Hogweed Heracleum mantegazzianum is an 'aggressive competitor', able to out-compete native plant species, reducing the amount of suitable habitat available for insects, birds and mammals ...

Giant hogweed is a federally listed noxious weed with a lim-ited nationwide distribution. Pennsylvania, New York and Washington state have the largest number of known giant hogweed sites.

Giant hogweed is a biennial or perennial herb in the carrot family (Apiaceae) which can grow to 14 feet or more. Its hollow, ridged stems grow 2-4 inches in diameter and have dark reddish-purple blotches. Its large compound leaves can grow up to 5 feet wide. Its white flower heads can grow up to 2 1/2 feet in diameter.

Giant hogweed is a perennial (sometimes biennial) distinguished by its large size, capable of growing to a height of 15-20 feet tall. It has stout dark reddish-purple spotted/splotched stems and leaf stalks. Stalks and stem produce sturdy purplish, pustulate bristles.

Giant Hogweed is a perennial herbaceous plant characterized by its massive size and architectural beauty. Its large umbrella-like flower clusters, known as umbels, can reach diameters of 2-3 feet (60-90 cm), consisting of hundreds of tiny white flowers.

2021年3月13日 · Giant hogweed (Heracleum mantegazzianum) is likely the largest and most dangerous to touch perennial weed in North America. In Ontario it commonly reaches heights of 3-4.5m but in other parts of the world it can reach heights of …

Giant hogweed can grow up to 15 feet tall, produce large clusters of white flowers that can be 2.5 feet wide, and have leaves up to 5 feet wide. It looks very similar to the native plant cow parsnip.