Poison Ivy, Poison Oak, and 7 Other Plants That Can Give You a... Poison Ivy: The Best-Known Itchy Plant. ... Poison Oak: Not Related to Oak Trees. ... Poison Sumac: Same Itch as Poison Ivy and Oak. ... Wood Nettle: Beware the Stinging Hairs. ... Stinging Nettle: Close Relative of Wood Nettle. ... Baby's Breath: Irritating When Dried. More items... Oct 21, 2022