I don't think I've ever seen seedlings before, but this looks like poison ivy to me. Still has cotyledons.
Is this some kind of scale insect? It's all over the trunk of this azalea. Last pic shows the azalea flowers.
I think it might be empty. Found in leaf little in my yard.
Larva found on a cultivated chocolate mint plant.
Foraging in clover.
Eating a dead earthworm.
I think these are the same species (or at least very similar to) the other ants I saw on a different peony.