In many parts of the US, there's poison ivy, a noxious weed that can cause severe itching, rashes, ect on contact with skin. It's common where I live, so I've b

In many parts of the US, there's poison ivy, a noxious weed that can cause severe itching, rashes, ect on contact with skin. It's common where I live, so I've become very good at identifying it. Sometimes it's just groundcover. Sometimes it's a shrub. Sometimes it's a vine. It's surprising how its stem can take many different forms.