When it's about plants, wildflowers specifically, I usually remember. But I think I saw it when I was looking at lobeline, which is in a lot of lobelia and if something in a plant refers to medicine, then that's what I remember. Might have been when I was checking out the cardinal flower -- Lobelia cardinalis. Some stuff just gets stuck in my mind and remains, other times I can't remember yesterday.
I don't think White Root grows here, so what do I know? Not much.