I was thinking that but looks a little off. Could it be Chelidonium majus (Celandine)? If it is it's invasive here and I'll pull it. Looks like seed pod is the way to differentiate. I found an article here. http://rivercitywildones.org/files/A_Tale_of_Two_Poppies.pdf My little woods is primarily natives with a couple invasives that I have been working on eliminating. Every year I seem to find a couple new species and it's a pretty small woods. This specimen is surrounded by trout liliy, bloodroot, a lady slipper, Jack-in-the-pulpit, maidenhead and ostrich fern, pasque flower and wood anemone.

I'm gonna make an off topic suggestion here. Try planting a native shrub rose. I planted this cute little rose a couple of years back, Virginia's rose. Sometimes called 'Pasture rose.' Scientific name Rosa virginiana. Planted it in honor of a dearly departed friend and mentor named Virginia. Oh, I guess maybe sometimes the plant goes by Virginia rose. Anyway, you can only find it at native plant nursuries. Here's the main point though. That THING grew into a huge, sprawling, behemouth of a thorny BEAST! I had it planted along a fence and it was threatening to take over my entire yard and my neighbor's garden. I live in a tight urban area, this was the wrong plant for that space. It was a beast to get rid of it too. I gave some of the runners to the local arboretum. Anyway, it's native, it's gorgeous when in bloom, it's hardy (I'm still finding runners) can stand the hot, soil-limited conditions of my yard. I would plant this in a heartbeat if I wanted a thorny hedge for a large property. You can get it at Edge of the Woods Native Plant nursery, which is maybe an hour or so drive from you. Worth a trip if you are a plant lover. They have a fabulous selection and are so nice at helping you choose the right plants. They're right off 22 west/ 309 north in Orefield. Go to www.edgeofthewoodsnursery.com and check it out. Call first to see if they have the plant. There are also other native, fast growing, imposing hedge plant selections. Go to the Web site and call them or e-mail and ask for help. Louise and Sue are very good people to work with and fabulously knowledgable on this subject (deer hedges and anything having to do with landscaping issues). I have NO affiliation with them other than I have bought from them for years and know that they are quite a presence here in the Lehigh Valley. Here is a link that might be useful: Edge of the Woods Nursery

Agree as well, AKA Jack in the Pulpit.

The purple phacelia id is spot -on... The flowers look almost like little prunus blossoms... For the white one I think Tiarella cordifolia looks pretty much the same according to my googling of images. Those are impressive ids imo! Thanks!!! blossom close-ups: Note the white buds are blooming from the bottom-->up.