They don't teach bartenders that? I was told about it in school on many different occasions; first was in the second grade when we for some reason were handling limes. Second was in home economics. Third in biology in senior high.
If I've ever heard it before, then I've forgotten it. I don't know if most people know about it, but "phytophotodermatitis" (plant+light+skin+inflammation) is a pretty cool word.
Didn't knew it, but a fig tree send a friend to the hospital with the same trick, delivering several weeks of excruciating pain and leaving permanent scars in his arms. Is impressive if we think about it.
I am curious, doesn't most people know this?