NATIVE NON-NATIVE NON-NATIVE Heracleum lanatum Heracleum mantegazzianum Conium macalatum cow parsnip giant hogweed poison hemlock
Native perennial that loves wet roadside Clear, watery sap has toxin that can cause photo All parts of the plant 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 plants from the More info at: parsley 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?Genus=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