Leaves of three, let it be?

[wngsprd]

I was hoping this would work, but it doesn't narrow things down any more than leaves of three (for my test cases). I went outside this weekend and took a few pictures. These are all plants within 100 ft of my house that I already knew about. I'm sure there are others around.

first pic / plant_a - I'm pretty sure this is the only poison ivy in these pictures. Some leaves have teeth and some do not. They are different sizes. The middle leave has a stem while the other two do not.
second pic / plant_b - Not positive what this is - possibly hog peanut or some type of ticktrefoil/desmodium. The leaves are the same shape as some of the ones in plant_a. It too has stems on the middle leaves, but not the other leaves.
third pic / plant_c - blackberry or raspberry. but it fits the 'leaves of three', and the middle leave has a stem while the other two do not.
fourth pic / plant_d - ticktrefoil/desmodium. again, leaves of three and the middle leave has a stem while the other two do not.

To me, its obvious that c and d are not poison ivy, just because I've been around them. b? not so obvious and I'm still not 100% certain. I did see some flowers once and they did "appear" to come from this plant, and they were not like poison ivy flowers. However, I would have had to walk through 5 ft of the stuff to get to the flower to make sure it was from the three leaved plant and not some other plant. Might as well just rub a leaf on my arm and wait an hour to see what happens.

Keith

I also agree that only the first pic is poison ivy. I've had great success with spraying with a 2% solution of glyphosate. I went to war on it this summer...sprayed 50 gallons from my tractor and got a good coating on the leaves. It died completely and did not resurface. My problem is a strip of pine forest full of it, and the birds eat the berries and drop the seeds around my fields and edges. I'm slowly making progress on that.

 

[caver]

Poison Ivy also tends to turn red around this time of year.

 

[PhysAssist]

So does the carolina creeper, but with 5 leaves, and then once the leaves fall off, who can tell one vine from another (excepting the obvious grape vines).