Cow Parsnips and Hogweeds: The Genus Angelica West of the Cascade Mountains

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

The Genus Heracleum

Cow Parsnip, Common Cow-parsnip, American Cow-parsnip: Heracleum maximum (Synonym: Heracleum lanatum)

Cow parsnip: Heracleum maximum

Giant Hogweed: Heracleum mantegazzianum -

Paul Slichter E-mail