Can anyone identify this plant?

[nycredneck]

Come across this plant all the time and once it left a nasty, itchy welt on my leg. I has a red stalk with hairs and thorns and the deadly infamous "leaves of three". It's poisonous.

[Marion]

That is the itchy stick of death. Won't be long now

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[nycredneck]

Oh the humanity.

[Otto]

Is it a vine or is it upright?  If it was upright, the stalk and leaves look like Japanese Knotweed, an invasive plant.  I spray it with weed killer several times a year, or it will completely take over an entire area.  

I did download an app on my phone that will identify it with just a snapshot of the plant.  

[The_Real_TCIII]

12 minutes ago, Otto said:

Is it a vine or is it upright?  If it was upright, the stalk and leaves look like Japanese Knotweed, an invasive plant.  I spray it with weed killer several times a year, or it will completely take over an entire area.  

I did download an app on my phone that will identify it with just a snapshot of the plant.  

so whats the app??

[Otto]

Sorry had to look it up.  Picture This is the ID app, Pl@antNet is another one that will give you a lot of information on the plant and habitat.  

[turkeyfeathers]

On ‎10‎/‎20‎/‎2017 at 9:35 AM, Otto said:

Sorry had to look it up.  Picture This is the ID app, Pl@antNet is another one that will give you a lot of information on the plant and habitat.  

I use Leafsnap and it works pretty good

[New York Hillbilly]

First I thought it was Blackberry, but now thinking it might be Wineberry. 

[Pygmy]

It is the dreaded venomous dingleberry....Better known as the VD plant.....