Poison ivy, poison oak, and poison sumac are three plants notorious for causing itchy, uncomfortable rashes that can turn a pleasant outdoor experience into a nightmare.

But once you know that there's something poisonous in your garden, how do you identify which plant it is? How can you tell if ...

But poison oak may have more than three leaves, and depending on the season, species and local environment, plants can vary. All parts of the plant, including roots, can cause an allergic reaction ...

The most common causes of ACD are the plants of the Rhus genus, poison ivy (toxicodendron radican), poison oak (toxicodendron quercifolium and toxicodendron diversilobum), and poison sumac ...