Poison ivy has leaves in groups of three, a green or reddish tint, and a hairy vine. A poison ivy rash looks like small, red bumps that can sometimes progress into blisters. To avoid poison ivy ...

When you’re spending time outdoors this summer, in your own yard or hiking in a park, it’s useful to know to spot poison ivy.

"I remember being like, 'We have to replicate everything about this,'" Brown told Barrymore, citing her hair in 1992's "Poison Ivy" as a major reference.