Poison ivy

имя существительное [ботаника] сумах укореняющийся ([латинский язык] Rhus radicans)

Большой англо-русский словарь

Poison ivy

noun 1. a. a climbing plant (Toxicodendron radicans syn. Rhus radicans) of the cashew family that is especially common in the eastern and central U.S., that has ternate leaves, greenish flowers, and white berries, and that produces an acutely irritating oil causing a usually intensely itching skin rash b. any of several plants closely related to poison ivy 2. a skin rash caused by poison ivy

Merriam-Webster's Collegiate Dictionary