Poison oak is a shrub that grows on the west coast and southeast region of North America. These poisonous plants have leaves that usually: Sometimes, there might be a visible black substance ...

The most common causes of ACD are the plants of the Rhus genus, poison ivy (toxicodendron radican), poison oak (toxicodendron ... dermatitis and the oleoresin plant oil, or urushiol (found in ...

If you come into contact with poison ivy, poison oak or poison sumac, you'll likely break out in an itchy, uncomfortable rash. Know what to look for so you can avoid them.

As more people venture outside to enjoy warm weather, knowing how to identify and avoid poison oak could help to avoid a future of headaches and itchy red rashes. A helpful old saying is “leaves ...

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

Touching the plant triggers a rash that usually isn't dangerous ... Poison sumac works the same way as poison ivy and poison oak - all three plants contain an oil called urushiol that causes ...

They also differ from poison oak, another rash-causing plant. Virginia creeper has five leaves, poison ivy has three, and poison oak usually has three -- though it can have more. (Credit ...