And even in samples with three leaves, the variation between those leaves can be vast. “Based on the research, poison ivy had ...

This is especially true for the well-known clustered leaves called poison ivy. Most gardeners and hikers tend to give the ...

Poison ivy contains an oil called urushiol, which causes a red, itchy rash when it transfers to the skin. Every part of the plant contains this oil, from the roots to the stem to the leaves ...

Rising atmospheric carbon dioxide levels are causing poison ivy leaves to grow larger and produce more of the toxic oil. Produced by Jacqui Frank. Original reporting by Jessica Orwig. Follow BI ...

The poison ivy contains an oily resin or sap in all parts of the plant that can cause an allergic reaction in most people ...

Call me a dope, but I had zero clue about the dangers of the "hairy rope" you may see on some New York State trees in the ...