Tree 1, Serviceberry
Tree 2, Alternate Leaved Dogwood

Thanks so much! Dogwood - great. Do you happen to know if any of these berries are edible for humans?

I think no 2 could be Coltsfoot, Tussilago farfara. Do you recall yellow dandelion-like flowers on scaly stems in early spring?

1.) O the tip of my tongue but I can't recall at the moment
2.) definitely coltsfoot. The underside of the leaves will be a downy silver-gray - quite a contrast to the topside.
3.) Looks like chokecherry, Prunus virginiana to me.
4.) Alternate-leaved dogwood, Cornus alternifolia. Berries edible? Plants for a Future doesn't list it as edible.

FataMorgana

Agree with the last list. The first one might be Erigeron annuus.