Hi. I’m pretty sure I haven’t seen one since we had to leave my childhood place in Bucks County Pennsylvania.
And I’d probably stopped looking for them in the springtime long before that. In New York & PA, ours were Sanguinaria canadensis.
I think I remember copying a drawing of one in my 9th grade paper on medicinal herbs, sitting in the lovely tiled library that had been created by an eccentric gentleman who built a museum for the handmade tools of the countryside, and supplied wonderful books on local history; I think most of the information I used came from local Indian traditions. It was not a mainstream subject back then.
Anyway–If you have an interest in handworking & craftsmanship you might like to see what Mr Mercer was up to at the time, and all the wonderful research, artifacts, and creations he left behind. I wouldn’t be surprised if he’d used the dye from bloodroot for something; he liked to do things the old–most fundamental–way.