Poison ivy is a kind of harmful vine or shrub belonging to the cashew family. It grows plentifully in parts of the United States and southern Canada. Poison ivy usually grows as a vine, twining on tree trunks or straggling over the ground. The plant often forms bushes if it has no support to climb on. The tissues of this plants contain a poisonous oil somewhat like carbolic acid.
This oil is extremely irritating the skin and it can be brushed onto the clothing or skins of people coming in contact with the plants. The leaves of poison ivy are red in early spring. Later they change to shiny green, while in autumn they turn red or orange. Each leaf is poisonous, berrylike drupes form. They are whitish, with a waxy look.
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