Noun
smooth American swamp shrub with pinnate leaves and greenish flowers followed by greenish white berries; yields an irritating oil
dermatitis resulting from contact with a poison sumac plant
Source: WordNetBut how do you tell poison sumac from non-poison sumac? Source: Internet
When 19th-century landscape architect Frederick Law Olmsted was 14 years old, his natural affinity for the rural New England outdoors took a dangerous turn when a brush with poison sumac left him half-blinded. Source: Internet
What are poison ivy, poison oak, and poison sumac? Source: Internet