What a nice coincidence Rick!
You have there a very prosperous one!
I like the plant so I might go back later where I found it and collect some seeds.
I like the Silybum marianum too!
Funny thing is that I had a visual memory of the Nicandra physalodes, I had met before also on a rubble field some years ago, (even had added pics of it in the database I had forgotten about!
) but didn't recall its name either..
I took a branch of the plant home and put it in a vase and today it opened one of its beautiful blooms.