Now renamed Ficaria verna, I believe, aka Lesser Celandine.

Potentilla species. not sure of which one but maybe Potentilla recta. Rhonda

I visited the plant in question this morning, and while under assault by a massive swarm of mosquitoes took some side views of the flowers. It appears that the petals are longer so I'm going to call it R. macounii. Thank you all again, you're knowledge is inspirational.

that looks like one of the mini daffodils in the brent and becky catalog. can't remember the name though. Try posting it on the bulbs forum.