I was always taught they were poisonous, too, though I grew up in Florida, so I wonder if yours is the same plant. Lucky you either way!
I grew up in Mississippi, and we called them ‘Cow Itch’. They grew wild along roadsides and up into trees like Kudzu.
We have them in Florida, too, and all across the Southeast.
That’s why I couldn’t understand Danie_2023’s post of wanting to ‘propagate’ them.
Heck, you can’t stop them! Once established, you need a flame thrower, bulldozer and a gallon of Roundup to kill them!................