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Poison ivy, aka ‘3 leaves’, is a type of allergenic plant in the genus Toxicodendron native to Asia and North America. Formerly considered a single species, Toxicodendron radicans , poison ivies are now generally treated as a complex of three separate species: Toxicodendron radicans , Toxicodendron rydbergii , and Toxicodendron orientale .
Toxicodendron radicans, commonly known as eastern poison ivy[ 3] or poison ivy, is an allergenic flowering plant that occurs in Asia and eastern North America. The species is well known for causing urushiol-induced contact dermatitis, an itchy, irritating, and sometimes painful rash, in most people who touch it.
Urushiol-induced contact dermatitis (also called Toxicodendron dermatitis or Rhus dermatitis) is a type of allergic contact dermatitis caused by the oil urushiol found in various plants, most notably sumac family species of the genus Toxicodendron: poison ivy, poison oak, poison sumac, and the Chinese lacquer tree. [1]
The common phrase “leaves of three, let it be” is a good starting point when trying to identify poison ivy, but some other common plants sport three leaves. The leaves on a poison ivy plant in ...
In areas where desirable plants also reside, hand pulling the poison ivy may be the best control. This should only be attempted when the soil is wet. Hand pulling works best on small seedlings.
Where the poison ivy is ascending into trees, take a long-handled ax or saw and cut through the ivy’s trunk near the ground line. Next, come up 18 inches higher and cut completely through its ...
Mill. [1] Toxicodendron is a genus of flowering plants in the sumac family, Anacardiaceae. It contains trees, shrubs and woody vines, including poison ivy, poison oak, and the lacquer tree. All members of the genus produce the skin-irritating oil urushiol, which can cause a severe allergic reaction.
Contact with anything that touched the poison ivy, oak or sumac can cause a rash within 12 to 72 hours. These include pets, clothes, tools, shoes or a hiking backpack. Also, by the way, if it’s ...
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