Toxicodendron radicans (Poison Ivy)

This is one leaf that I will not bring in to the office to scan. It is also one of the few native plants that I try to discourage from growing in our yard, for obvious reasons.




These pictures of young Toxicodendron radicans (Poison Ivy) plants were taken in the woods behind our house on May 11-25, 2011.
A week or so ago I bought some "Roundup Poison Ivy Plus Tough Brush Killer" concentrate to try to get rid of these pretty little plants. After mixing it with water to make a gallon, I've been using a soft artist's paint brush to wet the leaves of the poison ivy and a few other invasives in the immediate vicinity. I've noticed some wilting and leaf deterioration, so I guess it's working, and my paint brush is still dead.

I was curious about the ingredients of this poison plant poison, but couldn't find them on the label nor on Roundup's web site, which just said it had 2 active ingredients. Toward the bottom of a 100-result Google search for "Roundup Poison Ivy Plus Tough Brush Killer ingredients," I found that besides Glyphosate (which I had assumed. since that's what's in regular Roundup), the other ingredient is Triclopyr triethylamine (TEA) salt. Tryclopyr is what's in Garlon 4, which is what I've seen recommended for killing buckthorn, so I guess it makes sense.