- poison sumac - dermatitis resulting from contact with a poison sumac plant
--1 is a kind of Rhus dermatitis
- poison ash, poison dogwood, poison sumac, Toxicodendron vernix, Rhus vernix - smooth American swamp shrub with pinnate leaves and greenish flowers followed by greenish white berries; yields an irritating oil
--2 is a kind of poisonous plant
--2 is a member of Toxicodendron, genus Toxicodendron - poison ash, poison dogwood, poison sumac, Toxicodendron vernix, Rhus vernix - smooth American swamp shrub with pinnate leaves and greenish flowers followed by greenish white berries; yields an irritating oil