Impatiens capensis or Jewelweed is a wildflower.
It is growing quite nicely along the dock over at my baby brothers home. It likes a bit of sun and lots of moisture to grow well. Flowers can be orange or yellow.
See the fleshy stem/stalk...the clear gelatinous substance inside is what kills the itch and spread of poison ivy. I pick the largest stalks and split them open with a knife. Some people will keep stalks in their freezer for the next years early poison ivy problems. We have a slurry in our fridge...one year Far Guy got some stalks and threw the whole stalk into the blender...it works great.
I managed to escape a huge outbreak of the Poison Ivy this year...I had three small spots...one should not touch sweaty cleavage with a lawn mowing glove. Lesson learned.
Far Side