tree seedling id, please
Can someone tell me what this plant might be? I noticed it earlier this year, but it's obviously been there since last year sometime.
I should have put a ruler in the photo; the diagonal stem in the lower right corner is a thalictrum, and is about 1.4 inch wide, and the plant is about 18 inches tall. By the way, is growing where I removed a magnolia; I really hope that's what it is, but that's probably just wishful thinking.
If there are no replies here, I'll try the Name that Plant forum. Thanks!