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Definition of Poison ash
1. Noun. Smooth American swamp shrub with pinnate leaves and greenish flowers followed by greenish white berries; yields an irritating oil.
Exact synonyms: Poison Dogwood, Poison Sumac, Rhus Vernix, Toxicodendron Vernix
Group relationships: Genus Toxicodendron, Toxicodendron
Generic synonyms: Poisonous Plant
Group relationships: Genus Toxicodendron, Toxicodendron
Generic synonyms: Poisonous Plant