Poison ivy is not, technically, an ivy. Poison oak is not an oak. Poison sumac has nothing to do with sumac trees. And by the way, none of them are poisonous.The irritating oil they produce, urushiol, is not at all toxic, but it does happen to be an oil that most people are highly allergic to. Oddly enough, only humans are bothered by exposure to urushiol. No one knows why the plants have singled out people for their unique form of vitriol.
~ Amy Stewart ~
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