What does poison ivy look like? Here's a guide to help you spot poisonous plants ... stinging nettle, manchineel tree, wild parsnip, cow parsnip, poison hemlock, and rash-causing primrose. ...

They may look pretty, but Wild Parsnip and Cow Parsnip, now flowering in Oshawa and around southern Ontario, are toxic weeds that contain compounds that can burn the skin or eyes, becoming even worse ...

It can take weeks to heal. It looks a lot like you've had a severe burn. CG: ... But cow parsnip is different where you do not have to be looking for trouble.