Quiz Question: October 9, 2011

Discussion in 'The Village Square' started by Delly, Oct 9, 2011.

  1. Delly

    Delly In Flower

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    Urushiol is produced by what plants?
     
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  3. eileen

    eileen Resident Taxonomist Staff Member Moderator Plants Contributor

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    Poison ivy, poison oak, and poison sumac and other similar plants release an oil, urushiol, when the leaf or other plant parts are bruised, damaged, or burned. When the oil gets on the skin an allergic reaction, referred to as contact dermatitis, occurs in most exposed people as an itchy red rash with bumps or blisters. When exposed to 50 micrograms of urushiol, an amount that is less than one grain of table salt, 80 to 90 percent of adults will develop a rash.
     
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  4. muddypaws

    muddypaws Seedling

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    I think poison ivy and poison oak.
     
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  5. Jerry Sullivan

    Jerry Sullivan Garden Experimenter Plants Contributor

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    I am allergic to this stuff and whenever I see these members of the Anacardiaceae family it gets ripped out and destroyed. Poison ivy is plantis nongratus in our yard. As for poison oak and poison sumac, they do not exist in my yard but would be equally unwelcome.

    Jerry
     
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  6. Delly

    Delly In Flower

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    Poison ivy, Poison Oak, Poison Sumac all produce a skin irritant called urushiol. Touching these plants will cause an allergic reaction, usually in the form of an itchy rash on the skin.
     
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