The last one looks like a double Philadelphus - perhaps 'Virginal'. Also commonly known as Mock Orange.

First one yes, looks like rugosa alba
Second is either blackberry or raspberry. Check the underside of the leaf. If it's whitish and fuzzy, it's a raspberry.
Fourth is probably a beech tree?

# 3 looks a lot like Gaywings, a.k.a. Fringed Polygala (Polygala paucifolia). I'm jealous - for five years I've been trying to find someplace that sells this, and it's growing in your yard! It's beautiful.

- wd

Thanks for all the IDs! I will check the underside of a leaf on that wild berry plant.

Well-drained, I think your ID is right on, looked it up on the USDA website. Actually, the Polygala is not growing in my yard - it's the only one of the 5 plants. I took that picture while walking in a local conservation area on May 22nd. Also blooming on the forest floor at that time were Cornus canadensis, Cypripedium, Anemone, Star flower, along with this little purple flower.

I wonder if you could obtain seed if you can't find the plants?