NATIVE NON-NATIVE NON-NATIVE Heracleum lanatum Heracleum mantegazzianum Conium macalatum cow giant hogweed poison hemlock

Native perennial that loves wet roadside Clear, watery sap has toxin that can cause photo All parts of the are poisonous to humans, pets, ditches. Sap can cause rashes and burns dermatitis – skin contact followed by exposure to and livestock. Toxins can be absorbed through the similar to giant hogweed. sunlight produces scarring burns. Eradication required. skin and respiratory system.

thick rigid no hair, but stem with fine similar purple white fuzzy spots hairs

stalks have coarse short white hairs and purple spots Ben LeglerLegler

leaves 3 to 5 feet wide, flowers up to 2 feet in diameter, grows 10 to 15 feet tall

Leaves are smaller and less dissected, flowers are 6 to 10 inches wide, grows to 8 feet tall often confused with other from the More info at: family More info at: http://your.kingcounty.gov/dnrp/library/water- More info at: http://biology.burke.washington.edu/herbarium/imagecol and-land/weeds/BMPs/hogweed-control.pdf http://your.kingcounty.gov/dnrp/library/water-and- lection.php?=Heracleum&Species=maximum land/weeds/Brochures/Poison-Hemlock_factsheet.pdf

http://biology.burke.washington.edu/herbarium/i http://www.oregon.gov/ODA/PLANT/WEEDS/pages/weed magecollection.php?Genus=Heracleum&Species=m http://www.mdinvasivesp.org/archived_invaders/archiv _gianthogweed_id.aspx antegazzianum ed_invaders_2008_07.html