Heracleum mantegazzianum Sommier & Levier
Family: Apiaceae
giant hogweed
Heracleum mantegazzianum image
Mass. Dept. of Ag. Resources  
Heracleum mantegazzianum image
Mass. Dept. of Ag. Resources  
Heracleum mantegazzianum image
University of Wisconsin - Madison (WIS-VP)  
Etymology: Heracleum: named for Hercules, who was supposed to have used it first for medicine
Plants: erect, biennial/perennial, 10'-15' tall forb; stems hollow, dark reddish-purple, hairy, each of the hairs surrounded by a purplish raised node; tuberous roots
Leaves: deeply palmately cut, up to 5' wide, underside with coarse hairs, stalk spotted
Flowers: white, 5-parted; inflorescence a flat, many-branched umbel up to 20" wide; blooms May-July
Hazardous: Careful, this plant is hazardous!
Invasiveness: Prohibited Invasive - Eradicate!
Conservation Status: Introduced - locally established; potentially invasive
Heracleum mantegazzianum image
Mass. Dept. of Ag. Resources  
Heracleum mantegazzianum image
Heracleum mantegazzianum image
Heracleum mantegazzianum image
Heracleum mantegazzianum image
Heracleum mantegazzianum image
Heracleum mantegazzianum image
Heracleum mantegazzianum image