Poison ivy (Toxicodendron radicans) is a vine that contains an oily resin known as urushiol. According to the Centers for ...

common signs of a poison ivy rash show up at the point of contact and include: Intense and persistent itchiness that can wake you up from sleep Red, swollen bumps that may grow in size Blisters ...

Another plant you really want to avoid touching is the wild parsnip. These look related to the aforementioned giant hogweed, ...

In shady areas, it can grow like a climbing vine ... depending on the time of year. Like poison ivy and poison sumac, poison oak releases an oil called urushiol when it sustains damage.

When you’re spending time outdoors this summer, in your own yard or hiking in a park, it’s useful to know to spot poison ivy.

Poison Ivy thrives in a climate changed world. Plants grow faster, bigger and have more toxic oils with increasing concentration of CO2 in the atmosphere and higher temperatures. As warmer ...