A new plant has made its way into the us thats worse than poison ivoy whats its name?

It's a bigger leaf than poison ivoy and leaves burn marks for several weeks and even scars not blisters

Answers:
Most likely it is poison sumac. Its poison is worse than poison ivy or oak, it can leave scars, if you get a large enough dose. the poison in the leaves is called urushiol, which is also the same as in poison ivy / oak only stronger concentrations. It is not as common as ivy/oak but it is native to the U.S. if you havent heard of it before, don`t worry many people havent.

Other answers:
Is it kudzu?
Is it kudzu?
Poison Oak
Perhaps what you're talking about is poison sumac (Toxicodendron vernix)?
I believe Norm is correct. However, poison oak is not new. Nor is poison ivy. They are actually native to the southeast. And yes, poison oak can warrant a trip to the hospital for a steroid treatment. Then again, so can the ivy. I know first hand. But, the oak is worse.
Kudzu came here from Japan, and is not poisonous, just way too invasive. It does, however, have beautiful and fragrant purple blooms in summer.

If you are not referring to poison oak, then maybe we have a new enemy on our hands. Oh no.........
Hogweed
Hogweed, and beware, it's a nasty weed.
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