Officials also say cow parsnip’s stems do not have the purple blotches found on hogweed. Despite their differences, both plants are capable of irritating your skin.

A 2008 photo shows a remaining patch of original prairie with cow parsnip in the foreground near Steptoe Butte in Whitman County in the Palouse, Washington.

Officials also said cow parsnip’s stems do not have the purple blotches found on hogweed. Despite their differences, both plants are capable of irritating your skin.