Cow Parsnips and Hogweeds of the Cascade Mountains of Oregon and Washington

The Genus Heracleum

American Cow-parsnip, American Hogweed, Cow Parsnip, Common Cow-parsnip: Heracleum maximum (Synonyms: Heracleum douglasii, Heracleum lanatum, Heracleum sphondylium ssp. montanum, Heracleum sphondylium var. lanatum, Pastinaca lanatum) -

Giant Hogweed: Heracelum mantegazzianum -